Question
You wish to test the following claim (H) at a significance level of a = 0.05....
You wish to test the following claim (H) at a significance level of a = 0.05. For the context of this problem, d= 22 - 21 where the first data set represents a pre-test and the second data set represents a post-test. H:Hd = 0 H:Hd < 0 – 11.9 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= 85 subjects. The average difference (post-pre) is d = with a standard deviation of the differences of sd = 42.2. 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 =
Answers
Critical value of the test is
Critical value
( from t table )
Test Statistic
t = -2.600
to = t0,05 = -1.663t=d/(Sa/n)t = -11.9/(42.2/85)
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