Researchers have collected data on the hours of studying in a week and the exam grade of a student. You are given the data below.
Hours of Studying
Exam Grade
1
55
3
75
4
80
3
85
6
99
?
a.
Compute the least squares estimated regression equation.
b.
Compute the correlation coefficient.
c.
Compute the coefficient of determination. How would you interpret this value?
?
What will be an ideal response?
a. |  = 50.621 + 8.288x |
b. | .9388 |
c. | .8813. 88.13% of the variation in exam grades is explained by the variation in hours studying. |
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