Question: This is in Statistics. Solve the problem below. 6. (10 points) A sample of 15 measurements of the breaking strengths of cotton threads gave a

This is in Statistics. Solve the problem below. 6. (10 points)

This is in Statistics. Solve the problem below.

6. (10 points) A sample of 15 measurements of the breaking strengths of cotton threads gave a mean of 7.38 oz and a standard deviation of 1.28 oz. Assume normal distribution, find (a) 95%, (b) 99% confidence limits for the actual mean breaking strength. Note: Xtt- where c = a , and a = 1 _ yoconfidence n 2 100

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