ADM 2304 Lecture Notes - Lecture 7: Box Plot
13 May 2017
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> there is good evidence that the avg. bill in munic. Ii exceeds e. g, is there evidence of a difference in avg. monthly bills? df = 40. 13: to determine whether to reject, we need to look at the row in the t-table with 40 degrees of freedom t. 2. 2: to determine whether to reject, we need to look at the row in the t-table with. However, the text only gives rows for d. f. > in this case the conclusion in both the pooled and the unpooled version was to reject the null so . > there is evidence at the 5% signi cance level of a difference in avg. monthly bills between municipalities. Pr t t stat or reject if h. > compute the mean and sd of the differences and perform a one sample t-test. 3 d = 1. 45 d = 3. 203 s n = 20. > determine whether scores have increased from the pre-test to the post-test.
