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Author Question: Shown below is a portion of the computer output for a regression analysis relating sales (Y in ... (Read 74 times)

acwiles

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on: Mar 25, 2023

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.

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by acwiles on Mar 25, 2023

khammond77

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Reply #1 on: Mar 25, 2023
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acwiles

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Reply 2 on: Mar 25, 2023
Thanks for the timely response, appreciate it

aruss1303

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Reply 3 on: Yesterday
Wow, this really help

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