OO IDEAS X * Course Hero * Course Hero X Course Hero X Homework Help - Q& x * Homework Help - Q& X + X C imathas.humber.ca/assess2/?cid =493&laid=18010#/skip/4 QE IM HUMBER COLLEGE DO STAT1112 Some latest study shows that college students are increasingly skimping on their sleep. 1hr48mins A researcher from a small community college wants to estimate the mean weekdays sleep time of its students. He takes a random sample of 88 students and records their weekday mean sleep time as 6.80 hours. Assume that the population standard deviation is fairly stable at 1.20 hours. (a) Construct a 90% confidence interval for the population mean weekday sleep time of all students of this college Use the following table of zg for most common o values. 0.00 0.01 0.02 0.03 0.04 0.05 0.06 D.1 2.575 2.33 2.05 1.88 1.75 1.645 1.555 1.28 2.81 2.575 2.33 2.17 2.05 1.96 1.88 1.645 Find z= Round the margin of error and the confidence interval endpoints to 2 decimal places. Calculate the margin of error E = What is the 90% confidence interval?