Question: 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

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 1.332 1.0942 1.0112 1.0262 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?

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