A random sample of 27 items is drawn from a population whose standard deviation is unknown. The sample mean is x⎯⎯x¯ = 940 and the sample standard deviation is s = 15. Use Appendix D to find the values of Student’s t. (a) Construct an interval estimate of μ with 99% confidence. (Round your answers to 3 decimal places.)    The 99% confidence interval is from to   (b) Construct an interval estimate of μ with 99% confidence, assuming that s = 30. (Round your answers to 3 decimal places.)    The 99% confidence interval is from to   (c) Construct an interval estimate of μ with 99% confidence, assuming that s = 60. (Round your answers to 3 decimal places.)

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.