As a laboratory assistant, you measure chemicals using the metric system. for your current research, you need to measure out 45 grams of sodium chloride. the bottle you are using lists the amount in ounces. about how many ounces of sodium chloride will you need?

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.