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.