Question

1. If the population variance is 100, then
A.it is fixed, but unknown to the experimenter
B.the sample standard deviation will be 10
C.it will be used in calculating a t-statistic
D.it is subject to sample variation

2. Suppose we measure the distance two golf balls fly when hit by a mechanical golf club. We observe 100 distances for each ball. Golf ball A flies a mean distance of 265 yards, while golf ball B flies a mean distance of 272 yards. Suppose the variance of the distances measured for golf ball A is 65 and the variance of the distances measured for golf ball B is 54. If the 5% critical value is 1.98, then the null hypothesis that the mean distance both balls travel is the same will be rejected.
True/False

Answer 1