Assume youve collected information from 6 students as to

Question

Assume you've collected information from 6 students as to how many hours they work each week and their grade point averages (GPAs). The information is shown below.

Mean of X = 20           Standard Deviation of X = 15.17

Mean of Y = 3.36         Standard Deviation of Y = 0.58

Note that the two variables, or number of hours worked each week (X) and GPA (Y), have already been transformed into Z scores.

a. Calculate and interpret r.

b. Calculate and interpret r².

c. Calculate a and b in the regression equation (Y' = a + b_X).