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[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).

 

Then answer the following questions:

 

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

 

95 RADIO

 

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).

 

Then answer the following questions:

 

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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