Health insurance administrative costs are the concern for many companies which supply the insurance for their employees. The information below is information collected recently. Let x be the average number of employees in a group health insurance plan and y be average administrative cost as the percentage of claims. Find out the sample correlation coefficient.
x

4

14

20

47

70

y

43

42

34

18

18

A. 0.914
B. 0.942
C. 0.887
D. 0.942
E. 0.887