Question 1185173: A researcher wishes to test the effects of excerise on the ability to complete a basic skills test. He designs a pre-test and post-test to give to each participant. You believe that there was a difference in the scores. You believe the population of the differences is normally distributed, but you do not know the standard deviation. When calculating difference use Post-test minus Pre-test.
pre-test post-test
68 71
81 79
88 78
64 64
53 56
54 58
99 106
68 59
57 58
99 93
The test statistic is: ____
The p-value is: _____
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! This is a paired t-test.
The test statistic is t (0.975, df=9); d(the mean)
values are (x2-x1); 3,-2,-10,0,3,4,7-9,1,-6
d=-0.9 with sd=5.74
critical value is -0.49
p-value = 0.63 for a two way test.
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