SOLUTION: Need help, I cant get the basis for this one. The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random sa

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Question 607281: Need help, I cant get the basis for this one.
The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random sample of 12 similar stores, she gathered the following information regarding the shelf space, in feet, devoted to pet food and the weekly sales in hundreds of dollars.

Store 1 2 3 4 5 6 7 8 9 10 11 12
Shelf Space 5 5 5 10 10 10 15 15 15 20 20 20
Weekly Sales 1.6 2.2 1.4 1.9 2.4 2.6 2.3 2.7 2.8 2.6 2.9 3.1
1) Compute the value of the sample correlation coefficient between weekly sales and shelf space.
possible answers: A. 0.684 ; B. 0.827 ; C. 0.652 ; D. 0.308

Thank you
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

Shelf Space 5 5 5 10 10 10 15 15 15 20 20 20

 Weekly Sales 1.6 2.2 1.4 1.9 2.4 2.6 2.3 2.7 2.8 2.6 2.9 3.1 

correlation coefficient between weekly sales and shelf space is 

Highly recommend the Excel's CORREL function 

 

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