The marketing manager of a large supermarket chain would like to use shelf space to predict the ...

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
Shelf Space   5   5   5   10   10   10
Weekly Sales   1.6   2.2   1.4   1.9   2.4   2.6
 
Store         7   8   9   10   11   12
Shelf Space   15   15   15   20   20   20
Weekly Sales   2.3   2.7   2.8   2.6   2.9   3.1

Compute the value of the sample correlation coefficient between weekly sales and shelf space.

  A.0.827

  B.0.308

  C.0.684

  D.0.652