You wish to test the following claim (Ha) at a significance level of ?-0.02 For

Question

You wish to test the following claim (Ha) at a significance level of ?-0.02 For the context of this problem. -?? where the first data set represents a pre-test and the second data set represents a post-test 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-302 subjects. The average difference (post - pre) is d 3.7 with a standard deviation of the differences of sd 21.4 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

Explanation / Answer

for n =302 we can take the z score at .02 = 2.0537

t= d/sd/sqrt(n) = -3.7/21.4/sqrt(302) =-0.009949116

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