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Construct a 90% confidence interval estimate for the difference between two population means given the following...

Construct a 90% confidence interval estimate for the difference between two population means given the following sample data selected from two normally distributed populations with equal variances: Use SPSS

   Sample   1                   Sample 2

29          25        31          42           39           38

35        35        37            42           40           43

   21         29        34            46           39

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