Question: Using the data from Exercise 9.45 on GPAs, find a 95% confidence interval for the mean GPA. Also, if you had used a two-sided alternative

Using the data from Exercise 9.45 on GPAs, find a 95% confidence interval for the mean GPA. Also, if you had used a two-sided alternative (instead of the one-sided alternative in Exercise 9.45) and had done a test with a significance level of 0.05, would you have rejected a hypothesized mean GPA of 2.81?

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