Jim spent 2/3 of his total money on a new pet lizard. He has $17.25
left. If there was no tax added to the cost, how much money did Jim
spend on the lizard? (Keep in mind that he has 1/3
of his money left)

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.