(b) The company will not adopt material 1 unless its mean breaking strength exceeds that of material 2 by at least 15 psi. Based on the sample information, should it use material 1? Use a = 0.05 in reaching a decision. Find the P-value.

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A: here given  sample size  = n = 15 test statistic  = t  = 3.2 and here it is right tail test

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A: Both ques aren't related, hence answering Q.a.One sample t test

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Q: In a series of tests (see data table below), 15 rolls of wrap are made under carefully controlled…

A: Solution: X (X-X) (X-X)2 134 2.066667 4.271111 131 -0.93333 0.871111 129 -2.93333 8.604444…