A school counselor claims that the average number of sleep

Last updated: 3/1/2023

A school counselor claims that the average number of sleep students get each night is 6 hours A researcher has taken a well designed survey and his sample mean is 8 5 hours and sample standard deviation is 0 25 The sample size is 400 Which statement is correct O a The sample size should be much more O b The result of the survey is not statistically significant Oc The difference exists due to chance since the test statistic is small d The result of the survey is statistically significant