Does aerobic exercise reduce blood serum cholesterol levels?To find out,a medical researcher assigned subjects who were not already exercising regularly to a randomlyselected number of exercise hours per week.After 6 months of exercising the prescribed number of hours, each subject's cholesterol level was measured, yielding the data in the following table:

subject #= 1, 2, 3, 4, 5, 6, 7, 8

Per week= 4,7,2,11,5,1,10,8

Cholesterol levels= 220,180,210,170,190,230,200,210

a. Calculate the appropriate correlation coefficient for the data in the table

b. Report the significance of the correlation at the .05 level (two-tailed)

c. What conclusion can you draw from your answer to part b