You wish to test the following claim (Ha) at a significance level of a Hd = H2 - H1 where the first data set represents a pre-test and the second data set represents a post-test. 0.05. For the context of this problem, %3D Prl :°H Ha:Hd 70 µa = 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 deviation of the differences of sd = 14.4. 12 subjects. The average difference (post - pre) is d = 6.7 with a standard 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

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