[See Solution] Breaking Strength of Cable. A special cable has a breaking strength of 800 pounds. The standard deviation of the population is 12 pounds.
Question: Breaking Strength of Cable. A special cable has a breaking strength of 800 pounds. The standard deviation of the population is 12 pounds. A researcher selects a sample of 20 cables and finds that the average breaking strength is 793 pounds. Can he reject the claim that the breaking strength is 800 pounds? Find the P-value. Should the null hypothesis be rejected at a = 0.01? Assume that the variable is normally distributed.
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