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Author Question: Shown below is a portion of the computer output for a regression analysis relating sales (Y in ... (Read 73 times)

acwiles

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Shown below is a portion of the computer output for a regression analysis relating sales (Y in millions of dollars) and advertising expenditure (X in thousands of dollars).

Predictor

Coefficient

Standard Error

Constant

4.00

0.800

X

0.12

0.045


Analysis of Variance  
   
SOURCE

DF

SS

Regression

  1

1,400

Error

18

3,600


a.What has been the sample size for the above?
b.Perform a t test and determine whether or not advertising and sales are related. Let α = 0.05.
c.Compute the coefficient of determination.
d.Interpret the meaning of the value of the coefficient of determination that you found in Part c. Be very specific.
e.Use the estimated regression equation and predict sales for an advertising expenditure of $4,000. Give your answer in dollars.



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Marked as best answer by acwiles on Mar 25, 2023

khammond77

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acwiles

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Reply 2 on: Mar 25, 2023
:D TYSM


sultansheikh

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Reply 3 on: Yesterday
Wow, this really help

 

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