Suppose you want to test the claim the the paired sample data given below come from a population for which the mean difference is μd=0. x- 85, 78, 50, 87, 66, 60, 90 y- 73, 81, 61, 73, 59, 86, 68 Use a 0.05 significance level to find the following: (a) The mean value of the differnces d for the paired sample data d⎯⎯= (b) The standard deviation of the differences d for the paired sample data sd= (c) The t test statistic t= (d) The positive critical value t= (e) The negative critical value t= (f) Does the test statistic fall in the critical region? A. No B. Yes (g) Construct a 95% conficence interval for the population mean of all differences x−y. <μd
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