Bellingham, washington, had an area of 25.4 mi2 and a population of 74,547 during one year. bakersfield, california, had an area of 113.1 mi2 and a population of 295,536 during the same year. which city had a greater number of people per square mile? describe or show the process you used to find your answer.

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.