Christine sleep form 11pm until 9am what fraction of a day does Christine sleep​

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.

The product of sin 30 degrees and sin 60 degrees is same as the product of

What is the cube root of -1,000p^12q3? -10p^4 -10p^4q 10p^4 10p^4q