Select all that apply: We should reject Ho. We should not reject Ho. At the 1% significance level, the data do not provide sufficient evidence to conclude that the amount of time college athletes sleep per night is less than 8.4 hours. At the 1% significance level, the data provide sufficient evidence to conclude that the amount of time college athletes sleep per night is less than 8.4 hours.

Question According to a research study, college athletes slept 8.4 hours each night last year, on average. A random sample of 21 college athletes was surveyed and the mean amount of time per night each athlete slept was 7.9. This data has a sample standard deviation of 1.1. (Assume that the scores are normally distributed.) Researchers conduct a one-mean hypothesis test at the 1% significance level, to test if the mean amount of time college athletes sleep per night is less than the mean amount of time last year. (a) Ho : M 2 8.4; Ha : u