Question: Exercise 12-2 presented a regression model to predict final grade from two hourly tests. (a) Test the hypotheses that each of the slopes is zero.

Exercise 12-2 presented a regression model to predict final grade from two hourly tests.

(a) Test the hypotheses that each of the slopes is zero.

(b) What is the value of R² for this model?

(d) Do you believe that the professor can predict the final grade well enough from the two hourly tests to consider not giving the final exam? Explain.

Exercise 12-2

A class of 63 students has two hourly exams and a final exam. How well do the two hourly exams predict performance on the final? The following are some quantities of interest:

0.9129168 (X'X) =-0.00981502 -0.00071123 -9.815022e-03 1.49724le- 04 -4.158056e- 05 -7.11238e-04 -4.15806e- 05 5.81235e-

0.9129168 (X'X) =-0.00981502 -0.00071123 -9.815022e-03 1.49724le- 04 -4.158056e- 05 -7.11238e-04 -4.15806e- 05 5.81235e-05

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