Week and their grade point averages

Reference no: EM131830104

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.

1442_grade point averages.png

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).

Reference no: EM131830104

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