econds. 36_1&content_id=_7849529_1&isPasswordAttempted=true&password=adbd8523. * Question Completion Status: QUESTION 37 Round your answer to two digits after the decimal sign To estimate the mean time that the instructors spend helping students outside the classroom each week during a teaching session, a simple random sample of 40 instructors is taken. The time spent helping students outside the classroom for these 40 instructors was measured and the mean time for this sample was 567 minutes and standard deviation 129 minutes. Use the t-interval procedure to find the margin of error at a 95% confidence level. QUESTION 38 A 99% confidence interval has to be created to estimate the mean of the volume of contents in the bottles of an expensive medication. How large a simple random sample has to be taken so that the margin of error is no more than 15 ml? Assume that the population standard deviation is 20 ml. Round the answer up to the nearest whole number. bmit to save and submit. Click Save All Answers to save all answers. Hide hours Stop sharing