The annual Waikiki Roughwater Swim contest is held over a 2.4-mile course and ends near the Hilton Rainbow Tower. The 2013 winner was Rhys Mainstone in 48 minutes, 10 seconds.11 Before the race, a...

The annual Waikiki Roughwater Swim contest is held over a 2.4-mile course and ends near the Hilton Rainbow Tower. The 2013 winner was Rhys Mainstone in 48 minutes, 10 seconds.11 Before the race, a random sample of the current velocity (in knots) along the race course is obtained, and the resulting information is used to determine whether the race should be canceled. A mean current velocity,
 f more than 0.65 knots is considered unsafe.

a. State the null and alternative hypotheses.

b. Describe type I and type II errors in this context.

c. Which error is more serious for the swimmers? Why?

 d. Which error is more serious for the race organizers? Why?