A researcher obtained the combined math and reading SAT scores (X) (scale 400–1600) and GPAs (Y) of 396 college students and reported these regression results:

[ ]: t values

a. There is an error in these results. What is it?

b. The researcher said “Therefore I reject the null hypothesis and conclude that SAT scores and grades are not related.” What is the statistical basis for this conclusion and why is it wrong?

c. What other important explanatory variables do you think affect GPAs?

Transcribed Image Text:

Y = 1,146.0+1.4312X, R = 0.01 [5.86] [0.02]