0 Question9 v i l Epts '01 3 93 Details A scientific study was conducted to determine the hours of sleep that college students get per night. The study surveyed 22 college students and obtained the following data: 8.4, 8.6, 6.3, 7.7, 7.8, 8.9, 9.4, 8, 8.3, 8.1, 7.9, 8.9, 8.4, 6.9, 8.4, 8.6, 8.1, 8.3, 8.1, 8.6, 7.8, 8.7 Assuming the population standard deviation is a = 0.7 2, construct a 85% confidence interval for the average hours of sleep per night that college students get. . = :l E :1 2 _ Margin of Error: E = :] We are 85% confident that college students get an average of between :] hours and :] hours of sleep per night. Submit Question Z Nln * Previous ' Next > E 220_W11EC_Te....docx A ' ShowAll X