Ronan bought a one year train pass for 1080.00 Which gives him unlimited rides on the train if you were to buy train tickets each time he wrote drink each drive a car through hours and 56 which equation can be used to clean saving for the year is if he rides the train t times

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.