The rectangular diagram shows the design for a tood court at the zoo. What is the length of the walkway?
30 ft
snack bar
dining area
30 ft
40 ft
50 ft
garden
70 ft
30 ft
walkway
garden
30 ft
70 ft

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.