Consider the graph that represents the path of a golf ball, where x is the distance traveled in feet and f(x) is the height of the ball in yards.

In the context of the problem, which is an accurate interpretation of the point (50, 70)?

The ball traveled a total distance of 50 yards.
The ball traveled a total distance of 70 feet.
The ball reached a maximum height of 50 feet.
The ball reached a maximum height of 70 yards.

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.