At mei's printing company llc there are two kinds of printing presses: model a which can print 80 books per day and model b which can print 30 books per day. the company owns 10 total printing presses and this allows them to print 400 books per day. how many of each type of press do they have?

What is the range for 31,39,29,34,37,24,36,33,34,28

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x

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.