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

Step-by-step explanation:

1) The confidence interval is calculated as the following

Hence, the confidence interval is

11) Under two sid t-tailed test, the null hypothesis

Against the alternative hypothesis

Under null hypothesis

The degree of freedom is n - 1 = 140

From the t - table at 5% level of significance under two - tail is 1.96

Since , calculated value is lowe than the tabulated value, we do not reject the null hypothesis.

answer: none of these answers are correct only the second half is

step-by-step explanation: