A scientist measures the lengths of cells under a microscope. Write each measurement in scientific notation.
You can use to represent the exponent. For example 10 to the - 3rd power is 10^-3
0.000002 m =
0.0004 cm
0.0025 cm =

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.