Question

1. Heidi conducts a study to see if the number of hours participants spent watching Bravo TV shows is correlated with their final quiz grade. Below is her Data:

Hours	Grade
3	11
6	7
4	13
2	15
1	12

                What is r?

1. -.72
2. .64
3. -.31
4. .26

Please show your work in the space below

Answer 1

	Hours(x)	Grade(y)	xy	x^2	y^2
	3	11	33	9	121
	6	7	42	36	49
	4	13	52	16	169
	2	15	30	4	225
	1	12	12	1	144
Total	16	58	169	66	708

Substitute the values in above formula, we get

r = (5*169-16*58)/SQRT((5*66-16^2)*(5*708-58^2))

r = -0.72729                

The value for linear correlation coefficient that describe the relation between Hours and Grade is -0.72

This is a negative correlation between hours and grade variables..