Question

You wish to test the following claim ( H a ) at a significance level of α = 0.02 . For the context of this problem, d = x 2 − x 1 where the first data set represents a pre-test and the second data set represents a post-test.

H o : μ d = 0 H a : μ 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 = 17 subjects. The average difference (post - pre) is ¯ d = 17.6 with a standard deviation of the differences of s d = 18.6 .

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

PLEASE EXPLAIN HOW TO FIND THE CRITICAL VALUE USING A TI 84 CALCULATOR

Answer 1