Refer to Exercise 11.64.
(a) Fit a quadratic model Y = β0 + β1x + β2x2 + e to the data for CLEP scores y and CQT scores x.
(b) Use the fitted regression to predict the expected CLEP score when x = 160.
(c) Compute r2 for fitting a line and R2 for fitting a quadratic expression. Interpret these values and comment on the improvement of fit.
In Exercise 11.64

Transcribed Image Text:

27451202 17 2 5 5 17 18-05 657.4 7546 x-170 47 160 125 33 140 25 36 79