Question: The store manager is under impression that his sales people do more
business if they score higher on the social skills test which was
administered this year. 5 victims were selected at random. Below, the
results are X =test score, Y =weekly sales in $1000.

X (score) Y (sales)

4 4

5 6

3 5

6 7

10 7

a) Find the correlation coefficient for the relationship between test results and sales

b) What percent of the total change in "Y" is based solely on
changes in "X"?

c) Conduct a test to prove the hypothesis that there is a
correlation between "X" and "Y". Use a .05 level of significance. (Table in the text)

d) Find the regression equation for test scores vs. weekly sales