Compare two different materials a and b

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Reference no: EM131834686

In an experiment to compare two different materials A and B that might be used for manufacturing the heels of men dress shoes, 15 men were selected and fitted with a new pair of shoes on which one heel was made of material A and one heel was made of material B. At the beginning of the experiment, each heel was 10 millimeters thick. After the shoes had been worn for one

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month, the remaining thickness of each heel was measured. The results are given in Table 9.36. Test the null hypothesis that material A is not more durable than material B against the alternative that material A is more durable than material B, by using

(a) the sign test and

(b) the Wilcoxon signed-ranks test.

Reference no: EM131834686

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