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

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 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.