Graph the trigonometric function. y=-5/2 tan 3x
Start by drawing two consecutive asymptotes. Between those asymptotes, plot three points: a point where the graph intersects the x-axis, a point to its left,
and a point to its right. Finally, click on the graph-a-function button.

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.