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Slides Prepared by JOHN S. LOUCKS St. Edward抯 University [ ] [ ] [ ] m Chapter 8Interval Estimation Interval Estimation of a Population Mean: Large-Sample Case Interval Estimation of a Population Mean: Small-Sample Case Determining the Sample Size Interval Estimation of a Population Proportion Interval Estimation of a Population Mean:Large-Sample Case Sampling Error Probability Statements about the Sampling Error Interval Estimation: s Assumed Known Interval Estimation: s Estimated by s Sampling Error The absolute value of the difference between an unbiased point estimate and the population parameter it estimates is called the sampling error. For the case of a sample mean estimating a population mean, the sampling error is Sampling Error = Probability StatementsAbout the Sampling Error