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:

(a) Calculate the least squares estimates of the slopes for

hourly 1 and hourly 2 and the intercept.

(b) Use the equation of the fitted line to predict the final

exam score for a student who scored 70 on hourly 1 and

85 on hourly 2.

(c) If a student who scores 80 on hourly 1 and 90 on hourly 2

gets an 85 on the final, what is her residual?

Transcribed Image Text:

0.9129168 -9.815022e-03 -7.11238e-04 1.497241e-04 -4.15806e-05 (X'X) = -0.00981502 -0.00071123 -4.158056e-05 5.81235e-05