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A special cable has breaking strength of 800 pounds. the standard deviation of the population is...

A special cable has breaking strength of 800 pounds. the standard deviation of the population is 12 pounds . A research selects a sample of 20 cables and finds that the average breaking strength is 793 pounds. test the claim that breaking strength is less than 800 pounds. Should the null hypothesis be rejected at a=0.01? Assuming that the variable is normally distributed.

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orchestra answered 1 year ago
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