Use the given statistics to complete parts​ (a) and​ (b). Assume that the populations are normally distributed. ​(a) Test whether μ1>μ2 at the α=0.10 level of significance for the given sample data. ​(b) Construct a90​%confidence interval aboutμ1−μ2   Population 1 Population 2   n 26 21 x 46.9 41.3 s 6.9 13.1

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