Thirty-Eight Members of a Bowling League Sign Up for a Program

Multiple Choice

Thirty-eight members of a bowling league sign up for a program that claims to improve b scores. The participants bowl a set of five games before the program begins and a set of fi games again at the end to measure their improvement.

The mean number of points improved (over the set of five games) was $\bar { x } = 10$ . Assume th standard deviation is $\sigma = 45$ and let $\mu$ be the population mean number of points improved for the set of five games. To determine whether the program is effective, a test is made of the hypotheses $H _ { 0 } : \mu = 0$ versus $H _ { 1 } : \mu > 0$ .
Compute the value of the test statistic. wling

A) 1.37
B) 0.22
C) 0.0853
D) 9.19