A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯ = 770 and the sample standard deviation is s = 25. Use Appendix D to find the values of Student’s t.(a) Construct an interval estimate of μwith 95% confidence. (Round your answers to 3 decimal places.) Construct an interval estimate of μwith 95% confidence, assuming that s = 50. (Round your answers to 3 decimal places.)

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