TOY Calculate the average time the car took to reach each
checkpoint. Record the average time in Table D of your
Student Guide.
The average time to the first quarter checkpoint is
seconds.
The average time to the second quarter checkpoint is
seconds.
The average time to the third quarter checkpoint is
seconds.
The average time to the finish line is seconds.
ctivity
O

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.