Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded

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Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded condition and an abraded condition (“The Effect of Wet Abrasive Wear on the Tensile Properties of Cotton and Polyester-Cotton Fabrics,” J. Testing and Evaluation, 1993: 84–93). Use the paired t test, as did the authors of the cited article, to test H0:

D  0 versus Ha: D 0 at significance level .0.

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