What would be the correct units for the following problems? 1. the volume of a box measured with centimeters 2. the volume of a cone measured with meters 3. the volume of a cylinder with feet as the units 4. the area of a rectangle with units of inches 5. the area of a circle measured in yards

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.