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A special cable has a breaking strength of 800 pounds. A researcher selects a sample of 80 cables and finds that the average breaking strength

A special cable has a breaking strength of 800 pounds. A researcher selects a sample of 80 cables and finds that the average breaking strength is 793 pounds, with standard deviation equal to 12 pounds.

Can one reject the claim that the breaking strength is 800 pounds?

a.Write down the test hypotheses, the test statistic and the p-value.

b.Should the null hypothesis be rejected at the significance level of 0.01?

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