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A random sample of 15 high-purity steel yielded an average of 65.9 and a standard deviation of 1.5. Whereas, a random sample of 20 commercial

A random sample of 15 high-purity steel yielded an average of 65.9 and a standard deviation of 1.5. Whereas, a random sample of 20 commercial purity steel yielded an average of 59.8 and a standard deviation of 1.2. Calculate the value of the test statistic for the hypotheses in part (a), state the degrees of freedom and approximate the p-value

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