1.) 5 students were given an English test before and after receiving instruction on basic grammar. Their scores are as follows:
Student Before After
a 20 20
b 14 22
c 13 18
d 14 17
e 12 16
a) Calculate and appropriate t-test using those data. Based on your results, is it reasonable top conclude that future students would show higher scores after instruction? Why /why not?
b) Calculate the effect size as well as the confidence interval for the results in part a). What do these mean?
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