According to research study college music made just spent 23.3 hours practicing per week last year on average a random sample of 18 college music majors was serving in the mean amount of time per week each music may just been practicing 24.2 this data has a simple standard deviation of 3.5 researchers conduct a one main hypothesis test at the one percent significance level to test at the minimum amount of time music may just been practicing for a week is different than the main amount of time last year which chance of choice shows the correct note and alternative hypothesis for this test