Answer the following questions using the data from the Excel file grade inflation by semester.xlsx described in

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Answer the following questions using the data from the Excel file grade inflation by semester.xlsx described in Problem 16.41:

a. Forecast the average GPA for each semester during 2014 using a multiple regression with seasonal dummy variables.

b. Interpret the meaning of the coefficients for the seasonal dummy variables.

c. Calculate the MAD for this forecast.

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Answer the following questions using the data from the Excel file grade inflation by semester.xlsx described in

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Business Statistics

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