Question: Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded con dition and an abraded condition (The Effect

Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded con dition 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: µD = 0 versus Ha: µD> 0 at significance level .01.

Fabric 3 U 36.4 55.0 515 38.7 43.2 48.8 25.6 49.8 A 28.5 20.0 46.0 34.5 36.5 52.5 26.5 46.5

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