Problems 5 and 6

5. To determine the average college students' annual earnings a random sample of 9 students is selected. Their mean earnings are $3605, and their standard deviation is . Construct the 98% confidence interval (CI) and margin of error (ME) for the mean annual earnings of all college students. 6. A survey of 865 voters in one state revealed that 408 favor approval of an issue before the legislature. Construct the 95% confidence interval (CI) and margin of error (ME) for the true proportion of all voters in the state who favor approval