You wish to test the following claim H a at a significance

You wish to test the following claim (H a ) at a significance level of =0.01 . For the context of this problem, d = 2 1 where the first data set represents a pre-test and the second data set represents a post-test. H o : d =0 H a : d >0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n=48 subjects. The average difference (post - pre) is d =13.2 with a standard deviation of the differences of s d =27.7 .

What is the critical value for this test? (Report answer accurate to three decimal places.) critical value =

What is the test statistic for this sample? (Report answer accurate to three decimal places.)
test statistic =

The test statistic is...

in the critical region

not in the critical region

Solution