Plot the segment PO with endpoints P(-3, -3) and Q(1, 2) on the coordinate plane. Then find the length and midpoint of PQ. Enter the midpoint coordinates as a decimal if necessary.

The length of PO is___
The midpoint of PQ is M ( , )

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.