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Question 6 You received partial credit in the previous attempt. View previous attempt Check A random sample of 15 items is drawn from a population

Question 6

You received partial credit in the previous attempt. View previous attempt Check A random sample of 15 items is drawn from a population whose standard deviation is unknown. The sample mean is = 760 and the sample standard deviation is s = 20. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate of / with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (b) Construct an interval estimate of / with 99% confidence, assuming that s = 40. (Round your answers to 3 decimal places.) The 99% confidence interval is from to

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