A random sample of 21 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯x¯ = 750 and the sample standard deviation is s = 10. Use Appendix D to find the values of Student’s t. (a) Construct an interval estimate of μ with 98% confidence. (Round your answers to 3 decimal places.)  The 98% confidence interval is from ___ to____ (b) Construct an interval estimate of μ with 98% confidence, assuming that s = 20. (Round your answers to 3 decimal places.)  The 98% confidence interval is from ___ to____ (c) Construct an interval estimate of μ with 98% confidence, assuming that s = 40. (Round your answers to 3 decimal places.)  The 98% confidence interval is from ___ to____

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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.