Consider the estimated equation from Example 4.3, which can be used to study the effects of skipping class on college GPA: colGPA 5 1.39 1 .412 hsGPA 1 .015 ACT 2 .083 skipped (.33) (.094) (.011) (.026) n 5 141, R2 5 .234. (i) Using the standard normal approximation, find the 95% confidence interval for bhsGPA. (ii) Can you reject the hypothesis H0: bhsGPA 5 .4 against the two-sided alternative at the 5% level? (iii) Can you reject the hypothesis H0: bhsGPA 5 1 against the two-sided alternative at the 5% level