1. li needs to buy 2 kilograms of apples. if she buys 9 apples that each weigh approximately 150 grams, will she have enough? explain. 2. the science class is raising monarch caterpillars. one of the caterpillars weighs 2.3 ounces. about how many grams does the caterpillar weigh? round to the nearest tenth. answer both .

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.