How would you compare 15 counters with 8 counters in a sentence? with how many will each child have?

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.

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5