[answered] 1) Open the excel file (homework_for_MLR) Choose the sales_

Hi Tutors,

I have 2 Multiple Linear Regression models attached along with the excel file. ?I have not done these in quite a long time and any help would be appreciated in getting me back up to speed in solving these. ?Thank you!

1) Open the excel file (homework_for_MLR)

Choose the sales_by_adv file (along the bottom tabs)

Run a multiple linear regression using sales as the dependent variable where quarter is the

dummy variable and TV, Radio, and News are the advertising media (make sure to re format the

data properly first).

a) Discuss the R^2adj and Radj (to see if this is a feasibly good model)

b) Write out the equation of the model and define all the coefficients.

c) Run an F test.

d) Are any slopes problematic? Which ones? Give some reasons why you think this has

occured?

e) Predict the next year of sales if the following are the advertising budgets:

QTR

1

2

3

4 TV

105

98

102

90

93

103

92 NEWS

87

92

101

91 1) Open the excel file (homework_for_MLR)

Choose the crate file (along the bottom tabs)

Run a multiple linear regression (with trend) using crates as the dependent variable where

months are the dummy variable (make sure to re format the data properly first).

f) Discuss the R^2adj and Radj (to see if this is a feasibly good model)

g) Write out the equation of the model and define all the coefficients.

h) Run an F test.

i) Are any slopes problematic? Which ones? Give some reasons why you think this has

occured?

j) Predict the next year of crates needed.

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