Directions: Type the correct answer in the box. Use numerals instead of words. A pile of hay bales stacked in a barn have the dimensions shown in the sketch below.
4 feet
3 feet
2 feet
4 feet
6 feet
Using the given sketch, what is the volume of the pile of hay bales?
cubic feet

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.