Chapter Four Problems 4.23, 4.27,
4.33, and 4.35.
4.23
a) Compute MAD and MAPE for
management’s technique.
b) Do management’s results
outperform (i.e., have smaller MAD and MAPE than) a naive forecast?

c) Which forecast do you recommend,
based on lower forecast error?

4.27″Solution available”4.33
a) Forecast the number of
transistors to be made next year, using linear regression.

b) Compute the mean squared error
(MSE) when using linear regression.

c) Compute the mean absolute percent
error (MAPE).

4.35
a) Use the model to predict the
selling price of a house that is 1,860 square feet.

b) A 1,860-square-foot house
recently sold for $95,000. Explain why this is not what the model predicted.

c) If you were going to use multiple
regression to develop such a model, what other quantitative variables might you
include?

d) What
is the value of the coefficient of determination in this problem?

Chapter Four Problems 4.23, 4.27,
4.33, and 4.35.
4.23
a) Compute MAD and MAPE for
management’s technique.
b) Do management’s results
outperform (i.e., have smaller MAD and MAPE than) a naive forecast?

c) Which forecast do you recommend,
based on lower forecast error?

4.27″Solution available”4.33
a) Forecast the number of
transistors to be made next year, using linear regression.

b) Compute the mean squared error
(MSE) when using linear regression.

c) Compute the mean absolute percent
error (MAPE).

4.35
a) Use the model to predict the
selling price of a house that is 1,860 square feet.

b) A 1,860-square-foot house
recently sold for $95,000. Explain why this is not what the model predicted.

c) If you were going to use multiple
regression to develop such a model, what other quantitative variables might you
include?

d) What
is the value of the coefficient of determination in this problem?