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Statistics of Unabraded and Abraded Fabrics

Consider the accompanying data on breaking load (kg/25mm width) for various fabrics in both an unabraded condition and 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 null hypothesis and alternative hypothesis at significance level 0.01. (See attached file for full problem description and data table)

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Solution Summary

This solution finds the mean, standard deviation and variance to determine the test statistic for the t-test. Finally, a decision is made to accept or reject the null hypothesis.

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