Question

You wish to test the following claim ( H a ) at a significance level of α = 0.10 . For the context of this problem, μ d = P o s t T e s t − P r e T e s t where the first data set represents a pre-test and the second data set represents a post-test. (Each row represents the pre and post test scores for an individual. Be careful when you enter your data and specify what your μ 1 and μ 2 are so that the differences are computed correctly.) 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 the following sample of data:

pre-test = 51.5, 54.4,54,67.7,70.1,48.1,66,63,52.3,42.3,53.4,53.4,54,70.5,58.8,57.9,62.1,46.5,43.9,66

Post test =51.9,50.6,54.1,70.8,69.1,43.3,68.9,67.6,61,39.3,65.3,54.9,64,72.3,59.7,51.5,72.1,52.5,47.8,64.4

What is the test statistic for this sample? test statistic = Incorrect (Report answer accurate to 4 decimal places.) What is the p-value for this sample? p-value = Incorrect (Report answer accurate to 4 decimal places.)

Answer 1