Adria reads 5.75 articles in 34.5 minutes. How much of an article does Adria read in one minute? Input your answer as a fraction or a decimal.

What equation relates the number of articles, A, Adria can read in m minutes?

A=

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.