Question: Consider the estimated equation from Example 4.3, which can be used to study the effects of skipping class on college GPA: (i) Using the standard

Consider the estimated equation from Example 4.3, which can be used to study the effects of skipping class on college GPA:

colGPA = 1.39 + .412 hsGPA + .015 ACT – .083 skipped (.33) (.094) (.011) (.026) n = 141, R = .234.

(i) Using the standard normal approximation, find the 95% confidence interval for βhsGPA.

(ii) Can you reject the hypothesis H0: βhsGPA = .4 against the two-sided alternative at the 5% level?

(iii) Can you reject the hypothesis H0: βhsGPA = 1 against the two-sided alternative at the 5% level?

colGPA = 1.39 + .412 hsGPA + .015 ACT .083 skipped (.33) (.094) (.011) (.026) n = 141, R = .234.

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