A scientific study was conducted to determine the hours of sleep that college students get per night. The study surveyed 27 college students and obtained the following data: 8.8, 7.4, 8, 7.6, 8.6, 8.2, 7.5, 7.8, 8.4, 8.2, 8.2, 7.8, 8.2, 8.3, 8.4, 7.8, 7.9, 8.5, 8.3, 8, 7.6, 8.5, 8.3, 8.3, 7.7, 8.5, 7.7 Assuming the population standard deviation is o = 0.51, construct a 91% confidence interval for the average hours of sleep per night that college students get. N P Za Margin of Error: E = We are 91% confident that college students get an average of between hours and hours of sleep per night