You learn the average GRE score of private college graduates pursuing their MPH is 1500 with a standard deviation of 100. You want to determine whether CSU students are equally prepared. You randomly select 100 GRE scores of CSU graduates and find that the mean is 1545 with a standard deviation of 50. Do a hypothesis test to see if this difference is of any real significance at 0.05 . Apply and show all six steps.