Sarah correctly compares the values of the digits in 644.66. Select the comparison Sarah could have made. The value of the hundredths digit is 10 times the value of the tenths digit. The value of the ones digit is one over ten the value of the tens digit. The value of the tens digit is one over ten the value of the ones digit. The value of the hundreds digit is 100 times the value of the hundredths digit.

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.