To make tests of hypotheses about more than two population means, we use the: 

normal distribution

chi-square distribution

analysis of variance distribution

t  distribution

 

A continuous random variable  x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

not normal

skewed to the left

skewed to the right

approximately normal

 

The model  y = A + Bx  is a:

probabilistic model

stochastic model

nonlinear model

deterministic model

 

For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:

expected frequencies

observed frequencies

objective frequencies

subjective frequencies

 

An error that occurs because of chance is called:

probability error  

mean error 

nonsampling error 

sampling error 

 

What is the critical value of  z for the hypothesis test?

-2.05

-2.17

-2.33

-1.96

 

The regression model  y = A + Bx + e is: 

a deterministic model

a probabilistic model 

an exact relationship

a nonlinear model

 

A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is:

less than or equal to 30 minutes

less than 30 minutes

equal to 30 minutes

not equal to 30 minutes

 

What is the critical value of  t for the hypothesis test?

2.738

2.449

2.733

2.441

 

You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

At most one of them owns a telephone answering machine.

Exactly one of them owns a telephone answering machine.

At least one of them owns a telephone answering machine.

Neither of the two owns a telephone answering machine.

 

For small degrees of freedom, the chi-square distribution is:

rectangular

skewed to the left

skewed to the right  

symmetric

 

In a hypothesis test, a Type I error occurs when:

a true null hypothesis is not rejected

a false null hypothesis is not rejected

a false null hypothesis is rejected

a true null hypothesis is rejected

 

A quantitative variable is the only type of variable that can:

be used to prepare tables 

assume numeric values for which arithmetic operations make sense

have no intermediate values 

be graphed 

 

The mean of a discrete random variable is its:

box-and-whisker measure

upper hinge

expected value

second quartile

 

For a one-tailed test, the  p -value is:

twice the area under the curve between the mean and the observed value of the sample statistic

the area under the curve between the mean and the observed value of the sample statistic

the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

 

In a one-way ANOVA, we analyze only one:

mean

population

sample

variable

 

The alternative hypothesis is a claim about a:

parameter, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be false until it is declared true

parameter, where the claim is assumed to be true until it is declared false

 

A researcher wants to test if the mean annual salary of all lawyers in a city is different than $110,000. The null hypothesis for this example will be that the population mean is:

greater than to $110,000

not equal to $110,000

less than to $110,000

equal to $110,000

 

A qualitative variable is the only type of variable that:

cannot be graphed

can assume an uncountable set of values

can assume numerical values

cannot be measured numerically

 

You toss a coin nine times and observe 3 heads and 6 tails. This event is a:

multiple outcome

multinomial sample point

simple event

compound event

 

Which of the following pairs of events are mutually exclusive?

Female and male

No and yes

Female and yes

Female and no

 

The  p -value is the:

smallest significance level at which the null hypothesis can be rejected

smallest significance level at which the null hypothesis can be rejected

largest significance level at which the null hypothesis can be rejected

largest significance level at which the alternative hypothesis can be rejected

 

Which of the following assumptions is not required to use ANOVA?

The populations from which the samples are drawn have the same variance.

The populations from which the samples are drawn are (approximately) normally distributed.

The samples drawn from different populations are random and independent.

All samples are of the same size.

 

Two paired or matched samples would imply that:

two data values are collected from the same source (elements) for two dependent samples

two data values are collected from the same source (elements) for two independent samples

data are collected on two variables from the elements of two independent samples

data are collected on one variable from the elements of two independent samples

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

the mean of one population

two or more population proportions

two or more population means

 

The graph of a cumulative frequency distribution is a(n):

frequency histogram

line graph

stem-and-leaf display

ogive

 

In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

a false null hypothesis is not rejected

a true null hypothesis is not rejected

a true null hypothesis is rejected

 

The mean of a discrete random variable is the mean of its:

percentage distribution

frequency distribution

probability distribution

second and third quartiles

 

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the:

sample distribution 

sample proportion  

sampling distribution 

sample mean 

 

A linear regression:

gives a relationship between two variables that can be described by a line

gives a relationship between two variables that cannot be described by a line

gives a relationship between three variables that can be described by a line

contains only two variables

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

two or more population means

the mean of one population

two or more population proportions

 

For small degrees of freedom, the chi-square distribution is:

Rectangular

skewed to the left

​symmetric

​skewed to the right

 

The alternative hypothesis is a claim about a:

statistic, where the claim is assumed to be false until it is declared true

statistic, where the claim is assumed to be true if the null hypothesis is declared false

population parameter, where the claim is assumed to be true until it is declared false

population parameter, where the claim is assumed to be true if the null hypothesis is declared false

 

​In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

​a true null hypothesis is rejected

​a true null hypothesis is not rejected

​a false null hypothesis is not rejected

 

​In a one-way ANOVA, we analyze only one:

​population

​mean

​variable

​sample

 

To make tests of hypotheses about more than two population means, we use the: 

normal distribution

chi-square distribution

analysis of variance distribution

t  distribution

 

A continuous random variable  x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

not normal

skewed to the left

skewed to the right

approximately normal

 

The model  y = A + Bx  is a:

probabilistic model

stochastic model

nonlinear model

deterministic model

 

For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:

expected frequencies

observed frequencies

objective frequencies

subjective frequencies

 

An error that occurs because of chance is called:

probability error  

mean error 

nonsampling error 

sampling error 

 

What is the critical value of  z for the hypothesis test?

-2.05

-2.17

-2.33

-1.96

 

The regression model  y = A + Bx + e is: 

a deterministic model

a probabilistic model 

an exact relationship

a nonlinear model

 

A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is:

less than or equal to 30 minutes

less than 30 minutes

equal to 30 minutes

not equal to 30 minutes

 

What is the critical value of  t for the hypothesis test?

2.738

2.449

2.733

2.441

 

You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

At most one of them owns a telephone answering machine.

Exactly one of them owns a telephone answering machine.

At least one of them owns a telephone answering machine.

Neither of the two owns a telephone answering machine.

 

For small degrees of freedom, the chi-square distribution is:

rectangular

skewed to the left

skewed to the right  

symmetric

 

In a hypothesis test, a Type I error occurs when:

a true null hypothesis is not rejected

a false null hypothesis is not rejected

a false null hypothesis is rejected

a true null hypothesis is rejected

 

A quantitative variable is the only type of variable that can:

be used to prepare tables 

assume numeric values for which arithmetic operations make sense

have no intermediate values 

be graphed 

 

The mean of a discrete random variable is its:

box-and-whisker measure

upper hinge

expected value

second quartile

 

For a one-tailed test, the  p -value is:

twice the area under the curve between the mean and the observed value of the sample statistic

the area under the curve between the mean and the observed value of the sample statistic

the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

 

In a one-way ANOVA, we analyze only one:

mean

population

sample

variable

 

The alternative hypothesis is a claim about a:

parameter, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be false until it is declared true

parameter, where the claim is assumed to be true until it is declared false

 

A researcher wants to test if the mean annual salary of all lawyers in a city is different than $110,000. The null hypothesis for this example will be that the population mean is:

greater than to $110,000

not equal to $110,000

less than to $110,000

equal to $110,000

 

A qualitative variable is the only type of variable that:

cannot be graphed

can assume an uncountable set of values

can assume numerical values

cannot be measured numerically

 

You toss a coin nine times and observe 3 heads and 6 tails. This event is a:

multiple outcome

multinomial sample point

simple event

compound event

 

Which of the following pairs of events are mutually exclusive?

Female and male

No and yes

Female and yes

Female and no

 

The  p -value is the:

smallest significance level at which the null hypothesis can be rejected

smallest significance level at which the null hypothesis can be rejected

largest significance level at which the null hypothesis can be rejected

largest significance level at which the alternative hypothesis can be rejected

 

Which of the following assumptions is not required to use ANOVA?

The populations from which the samples are drawn have the same variance.

The populations from which the samples are drawn are (approximately) normally distributed.

The samples drawn from different populations are random and independent.

All samples are of the same size.

 

Two paired or matched samples would imply that:

two data values are collected from the same source (elements) for two dependent samples

two data values are collected from the same source (elements) for two independent samples

data are collected on two variables from the elements of two independent samples

data are collected on one variable from the elements of two independent samples

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

the mean of one population

two or more population proportions

two or more population means

 

The graph of a cumulative frequency distribution is a(n):

frequency histogram

line graph

stem-and-leaf display

ogive

 

In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

a false null hypothesis is not rejected

a true null hypothesis is not rejected

a true null hypothesis is rejected

 

The mean of a discrete random variable is the mean of its:

percentage distribution

frequency distribution

probability distribution

second and third quartiles

 

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the:

sample distribution 

sample proportion  

sampling distribution 

sample mean 

 

A linear regression:

gives a relationship between two variables that can be described by a line

gives a relationship between two variables that cannot be described by a line

gives a relationship between three variables that can be described by a line

contains only two variables

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

two or more population means

the mean of one population

two or more population proportions

 

For small degrees of freedom, the chi-square distribution is:

Rectangular

skewed to the left

​symmetric

​skewed to the right

 

The alternative hypothesis is a claim about a:

statistic, where the claim is assumed to be false until it is declared true

statistic, where the claim is assumed to be true if the null hypothesis is declared false

population parameter, where the claim is assumed to be true until it is declared false

population parameter, where the claim is assumed to be true if the null hypothesis is declared false

 

​In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

​a true null hypothesis is rejected

​a true null hypothesis is not rejected

​a false null hypothesis is not rejected

 

​In a one-way ANOVA, we analyze only one:

​population

​mean

​variable

​sample

 

To make tests of hypotheses about more than two population means, we use the: 

normal distribution

chi-square distribution

analysis of variance distribution

t  distribution

 

A continuous random variable  x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

not normal

skewed to the left

skewed to the right

approximately normal

 

The model  y = A + Bx  is a:

probabilistic model

stochastic model

nonlinear model

deterministic model

 

For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:

expected frequencies

observed frequencies

objective frequencies

subjective frequencies

 

An error that occurs because of chance is called:

probability error  

mean error 

nonsampling error 

sampling error 

 

What is the critical value of  z for the hypothesis test?

-2.05

-2.17

-2.33

-1.96

 

The regression model  y = A + Bx + e is: 

a deterministic model

a probabilistic model 

an exact relationship

a nonlinear model

 

A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is:

less than or equal to 30 minutes

less than 30 minutes

equal to 30 minutes

not equal to 30 minutes

 

What is the critical value of  t for the hypothesis test?

2.738

2.449

2.733

2.441

 

You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

At most one of them owns a telephone answering machine.

Exactly one of them owns a telephone answering machine.

At least one of them owns a telephone answering machine.

Neither of the two owns a telephone answering machine.

 

For small degrees of freedom, the chi-square distribution is:

rectangular

skewed to the left

skewed to the right  

symmetric

 

In a hypothesis test, a Type I error occurs when:

a true null hypothesis is not rejected

a false null hypothesis is not rejected

a false null hypothesis is rejected

a true null hypothesis is rejected

 

A quantitative variable is the only type of variable that can:

be used to prepare tables 

assume numeric values for which arithmetic operations make sense

have no intermediate values 

be graphed 

 

The mean of a discrete random variable is its:

box-and-whisker measure

upper hinge

expected value

second quartile

 

For a one-tailed test, the  p -value is:

twice the area under the curve between the mean and the observed value of the sample statistic

the area under the curve between the mean and the observed value of the sample statistic

the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

 

In a one-way ANOVA, we analyze only one:

mean

population

sample

variable

 

The alternative hypothesis is a claim about a:

parameter, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be false until it is declared true

parameter, where the claim is assumed to be true until it is declared false

 

A researcher wants to test if the mean annual salary of all lawyers in a city is different than $110,000. The null hypothesis for this example will be that the population mean is:

greater than to $110,000

not equal to $110,000

less than to $110,000

equal to $110,000

 

A qualitative variable is the only type of variable that:

cannot be graphed

can assume an uncountable set of values

can assume numerical values

cannot be measured numerically

 

You toss a coin nine times and observe 3 heads and 6 tails. This event is a:

multiple outcome

multinomial sample point

simple event

compound event

 

Which of the following pairs of events are mutually exclusive?

Female and male

No and yes

Female and yes

Female and no

 

The  p -value is the:

smallest significance level at which the null hypothesis can be rejected

smallest significance level at which the null hypothesis can be rejected

largest significance level at which the null hypothesis can be rejected

largest significance level at which the alternative hypothesis can be rejected

 

Which of the following assumptions is not required to use ANOVA?

The populations from which the samples are drawn have the same variance.

The populations from which the samples are drawn are (approximately) normally distributed.

The samples drawn from different populations are random and independent.

All samples are of the same size.

 

Two paired or matched samples would imply that:

two data values are collected from the same source (elements) for two dependent samples

two data values are collected from the same source (elements) for two independent samples

data are collected on two variables from the elements of two independent samples

data are collected on one variable from the elements of two independent samples

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

the mean of one population

two or more population proportions

two or more population means

 

The graph of a cumulative frequency distribution is a(n):

frequency histogram

line graph

stem-and-leaf display

ogive

 

In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

a false null hypothesis is not rejected

a true null hypothesis is not rejected

a true null hypothesis is rejected

 

The mean of a discrete random variable is the mean of its:

percentage distribution

frequency distribution

probability distribution

second and third quartiles

 

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the:

sample distribution 

sample proportion  

sampling distribution 

sample mean 

 

A linear regression:

gives a relationship between two variables that can be described by a line

gives a relationship between two variables that cannot be described by a line

gives a relationship between three variables that can be described by a line

contains only two variables

 

We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population

two or more population means

the mean of one population

two or more population proportions

 

For small degrees of freedom, the chi-square distribution is:

Rectangular

skewed to the left

​symmetric

​skewed to the right

 

The alternative hypothesis is a claim about a:

statistic, where the claim is assumed to be false until it is declared true

statistic, where the claim is assumed to be true if the null hypothesis is declared false

population parameter, where the claim is assumed to be true until it is declared false

population parameter, where the claim is assumed to be true if the null hypothesis is declared false

 

​In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected

​a true null hypothesis is rejected

​a true null hypothesis is not rejected

​a false null hypothesis is not rejected

 

​In a one-way ANOVA, we analyze only one:

​population

​mean

​variable

​sample

 

To make tests of hypotheses about more than two population means, we use the:  To make tests of hypotheses about more than two population means, we use the: 

normal distribution normal distribution

chi-square distribution chi-square distribution

analysis of variance distribution analysis of variance distribution

t  distribution t  distribution t t  distribution

   

A continuous random variable  x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is: A continuous random variable  x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is: A continuous random variable  x x  has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:

not normal not normal

skewed to the left skewed to the left

skewed to the right skewed to the right

approximately normal approximately normal

   

The model  y = A + Bx  is a: The model  y = A + Bx  is a: The model  y = A + Bx y = A + Bx  is a:

probabilistic model probabilistic model

stochastic model stochastic model

nonlinear model nonlinear model

deterministic model deterministic model

   

For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the: For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:

expected frequencies expected frequencies

observed frequencies observed frequencies

objective frequencies objective frequencies

subjective frequencies subjective frequencies

   

An error that occurs because of chance is called: An error that occurs because of chance is called:

probability error   probability error   probability error  

mean error  mean error 

nonsampling error  nonsampling error 

sampling error  sampling error 

   

What is the critical value of  z for the hypothesis test? What is the critical value of  z for the hypothesis test? z

-2.05 -2.05

-2.17 -2.17

-2.33 -2.33

-1.96 -1.96

   

The regression model  y = A + Bx + e is:  The regression model  y = A + Bx + e is:  y = A + Bx + e

a deterministic model a deterministic model

a probabilistic model  a probabilistic model 

an exact relationship an exact relationship

a nonlinear model a nonlinear model

   

A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is: A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is:

less than or equal to 30 minutes less than or equal to 30 minutes

less than 30 minutes less than 30 minutes

equal to 30 minutes equal to 30 minutes

not equal to 30 minutes not equal to 30 minutes

   

What is the critical value of  t for the hypothesis test? What is the critical value of  t for the hypothesis test? t

2.738 2.738

2.449 2.449

2.733 2.733

2.441 2.441

   

You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event? You randomly select two households and observe whether or not they own a telephone answering machine. Which of the following is a simple event?

At most one of them owns a telephone answering machine. At most one of them owns a telephone answering machine.

Exactly one of them owns a telephone answering machine. Exactly one of them owns a telephone answering machine.

At least one of them owns a telephone answering machine. At least one of them owns a telephone answering machine.

Neither of the two owns a telephone answering machine. Neither of the two owns a telephone answering machine.

   

For small degrees of freedom, the chi-square distribution is: For small degrees of freedom, the chi-square distribution is:

rectangular rectangular

skewed to the left skewed to the left

skewed to the right   skewed to the right   skewed to the right  

symmetric symmetric

   

In a hypothesis test, a Type I error occurs when: In a hypothesis test, a Type I error occurs when:

a true null hypothesis is not rejected a true null hypothesis is not rejected

a false null hypothesis is not rejected a false null hypothesis is not rejected

a false null hypothesis is rejected a false null hypothesis is rejected

a true null hypothesis is rejected a true null hypothesis is rejected

   

A quantitative variable is the only type of variable that can: A quantitative variable is the only type of variable that can:

be used to prepare tables  be used to prepare tables 

assume numeric values for which arithmetic operations make sense assume numeric values for which arithmetic operations make sense

have no intermediate values  have no intermediate values 

be graphed  be graphed 

   

The mean of a discrete random variable is its: The mean of a discrete random variable is its:

box-and-whisker measure box-and-whisker measure

upper hinge upper hinge

expected value expected value

second quartile second quartile

   

For a one-tailed test, the  p -value is: For a one-tailed test, the  p -value is: For a one-tailed test, the  p p -value is:

twice the area under the curve between the mean and the observed value of the sample statistic twice the area under the curve between the mean and the observed value of the sample statistic

the area under the curve between the mean and the observed value of the sample statistic the area under the curve between the mean and the observed value of the sample statistic

the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis

   

In a one-way ANOVA, we analyze only one: In a one-way ANOVA, we analyze only one:

mean mean

population population

sample sample

variable variable

   

The alternative hypothesis is a claim about a: The alternative hypothesis is a claim about a:

parameter, where the claim is assumed to be true if the null hypothesis is declared false parameter, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be true if the null hypothesis is declared false statistic, where the claim is assumed to be true if the null hypothesis is declared false

statistic, where the claim is assumed to be false until it is declared true statistic, where the claim is assumed to be false until it is declared true

parameter, where the claim is assumed to be true until it is declared false parameter, where the claim is assumed to be true until it is declared false

 

A researcher wants to test if the mean annual salary of all lawyers in a city is different than $110,000. The null hypothesis for this example will be that the population mean is: A researcher wants to test if the mean annual salary of all lawyers in a city is different than $110,000. The null hypothesis for this example will be that the population mean is:

greater than to $110,000 greater than to $110,000

not equal to $110,000 not equal to $110,000

less than to $110,000 less than to $110,000

equal to $110,000 equal to $110,000

   

A qualitative variable is the only type of variable that: A qualitative variable is the only type of variable that:

cannot be graphed cannot be graphed

can assume an uncountable set of values can assume an uncountable set of values

can assume numerical values can assume numerical values

cannot be measured numerically cannot be measured numerically

   

You toss a coin nine times and observe 3 heads and 6 tails. This event is a: You toss a coin nine times and observe 3 heads and 6 tails. This event is a:

multiple outcome multiple outcome

multinomial sample point multinomial sample point

simple event simple event

compound event compound event

   

Which of the following pairs of events are mutually exclusive? Which of the following pairs of events are mutually exclusive?

Female and male Female and male

No and yes No and yes

Female and yes Female and yes

Female and no Female and no

   

The  p -value is the: The  p -value is the: The  p p -value is the:

smallest significance level at which the null hypothesis can be rejected smallest significance level at which the null hypothesis can be rejected

smallest significance level at which the null hypothesis can be rejected smallest significance level at which the null hypothesis can be rejected

largest significance level at which the null hypothesis can be rejected largest significance level at which the null hypothesis can be rejected

largest significance level at which the alternative hypothesis can be rejected largest significance level at which the alternative hypothesis can be rejected

   

Which of the following assumptions is not required to use ANOVA? Which of the following assumptions is not required to use ANOVA?

The populations from which the samples are drawn have the same variance. The populations from which the samples are drawn have the same variance.

The populations from which the samples are drawn are (approximately) normally distributed. The populations from which the samples are drawn are (approximately) normally distributed.

The samples drawn from different populations are random and independent. The samples drawn from different populations are random and independent.

All samples are of the same size. All samples are of the same size.

   

Two paired or matched samples would imply that: Two paired or matched samples would imply that:

two data values are collected from the same source (elements) for two dependent samples two data values are collected from the same source (elements) for two dependent samples

two data values are collected from the same source (elements) for two independent samples two data values are collected from the same source (elements) for two independent samples

data are collected on two variables from the elements of two independent samples data are collected on two variables from the elements of two independent samples

data are collected on one variable from the elements of two independent samples data are collected on one variable from the elements of two independent samples

   

We can use the analysis of variance procedure to test hypotheses about: We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population the proportion of one population

the mean of one population the mean of one population

two or more population proportions two or more population proportions

two or more population means two or more population means

   

The graph of a cumulative frequency distribution is a(n): The graph of a cumulative frequency distribution is a(n):

frequency histogram frequency histogram

line graph line graph

stem-and-leaf display stem-and-leaf display

ogive ogive

   

In a hypothesis test, a Type II error occurs when: In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected a false null hypothesis is rejected

a false null hypothesis is not rejected a false null hypothesis is not rejected

a true null hypothesis is not rejected a true null hypothesis is not rejected

a true null hypothesis is rejected a true null hypothesis is rejected

   

The mean of a discrete random variable is the mean of its: The mean of a discrete random variable is the mean of its:

percentage distribution percentage distribution

frequency distribution frequency distribution

probability distribution probability distribution

second and third quartiles second and third quartiles

   

If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the: If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the:

sample distribution  sample distribution 

sample proportion   sample proportion   sample proportion  

sampling distribution  sampling distribution 

sample mean  sample mean 

   

A linear regression: A linear regression:

gives a relationship between two variables that can be described by a line gives a relationship between two variables that can be described by a line

gives a relationship between two variables that cannot be described by a line gives a relationship between two variables that cannot be described by a line

gives a relationship between three variables that can be described by a line gives a relationship between three variables that can be described by a line

contains only two variables contains only two variables

   

We can use the analysis of variance procedure to test hypotheses about: We can use the analysis of variance procedure to test hypotheses about:

the proportion of one population the proportion of one population

two or more population means two or more population means

the mean of one population the mean of one population

two or more population proportions two or more population proportions

   

For small degrees of freedom, the chi-square distribution is: For small degrees of freedom, the chi-square distribution is:

Rectangular Rectangular

skewed to the left skewed to the left

​symmetric ​symmetric

​skewed to the right ​skewed to the right

   

The alternative hypothesis is a claim about a: The alternative hypothesis is a claim about a:

statistic, where the claim is assumed to be false until it is declared true statistic, where the claim is assumed to be false until it is declared true

statistic, where the claim is assumed to be true if the null hypothesis is declared false statistic, where the claim is assumed to be true if the null hypothesis is declared false

population parameter, where the claim is assumed to be true until it is declared false population parameter, where the claim is assumed to be true until it is declared false

population parameter, where the claim is assumed to be true if the null hypothesis is declared false population parameter, where the claim is assumed to be true if the null hypothesis is declared false

   

​In a hypothesis test, a Type II error occurs when: ​In a hypothesis test, a Type II error occurs when:

a false null hypothesis is rejected a false null hypothesis is rejected

​a true null hypothesis is rejected ​a true null hypothesis is rejected

​a true null hypothesis is not rejected ​a true null hypothesis is not rejected

​a false null hypothesis is not rejected ​a false null hypothesis is not rejected

   

​In a one-way ANOVA, we analyze only one: ​In a one-way ANOVA, we analyze only one:

​population ​population

​mean ​mean

​variable ​variable

​sample ​sample

   

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