Estimation and Confidence Intervals When you have completed this chapter, you will be able to: LO 9-1 Define point estimate. LO 9-2 Define confidence interval. LO 9-3 Compute a confidence interval for the population mean when the population standard deviation is known. LO 9-4 Compute a confidence interval for the population mean when the population standard deviation is unknown. LO 9-5 Compute a confidence interval for a population proportion. LO 9-6 Calculate the required sample size to estimate a population proportion or population mean.
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