Question 1 What is the relationship between the confidence interval and the margin of error? Question 1 options: The confidence interval is half the width of the margin of error. The margin of error is twice the confidence interval. None of these The confidence interval is twice the margin of error

Question 3 A researcher is interested in estimating the how recent college graduates are using their degree in their current profession. In a random sample of 800 recent college graduates 280 report, they are not using degree with their current job. Compute a 90% confidence interval for the true proportion of recent college graduates that are not using their degrees in their jobs. Round to 3 decimal places. Lower limit = Upper limit =

Question 4 Write a summary statement for this confidence interval. Be sure to use the context of the problem.

Question 5 A community college would like to estimate the percentage of their students that have children under 18 years old. They randomly select 450 students and ask them about having children and their children's ages. The 90% confidence interval for this situation is (24.5%, 31.5%) Which statement below correctly summarizes the confidence interval? Question 5 options: The chance a student will have children (<18yr) is between 24.5% and 31.5%. We are 90% confident that the percentage of all students at this community college that have children (<18yr) is between 24.5% and 31.5%. There is a 90% chance that the percentage of students at this college that have children (<18yr) is between 24.5% and 31.5%. We are 90% confident that the percentage of all students at this community college that have children (<18yr) is 28%.

Question 9 Write a summary statement for your confidence interval in question #1.

Question 13 Write a summary statement for your confidence interval in question #5.

Question 14 How many commuters must be randomly selected to estimate the mean driving time of Baltimore commuters? We want 95% confidence that the sample mean is within 2 minutes of the population mean. Assume the population standard deviation is known to be 15 minutes. Question 14 options: 217 commuters 1645 commuters 68 commuters 15 commuters ________________________________________