Suppose you want to test the claim the the paired sample data given below come from a population for which the mean difference is ud=0.

x: 77 51 72 59 86 84 64

y: 81 72 91 65 72 83 91

Use a .01 significance level to find the following:

The mean value of the differences for the paired sample data

(b) The standard deviation of the differences for the paired sample data

(c) The t test statistic

(d) The positive critical value

(e) The negative critical value

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