FinalChapters 10,11, 16
Chapter 10•Learning Outcomes•Estimation•Point Estimate•Confidence Interval Estimate•Qualities of Estimators•Unbiased•Consistency•Efficiency•Calculate Sample Size
Estimation…The objective of estimation is to determine the approximate valueof a population parameter on the basis of a sample statistic.There are two types of estimators:Point EstimatorInterval Estimator10.3
Estimating when is known…The interval can also be expressed asLower confidence limit =Upper confidence limit =The probability 1 – α is the confidence level, which is a measure of how frequently the interval will actually include µ.10.4nzx2/nzx2/
Interval Width…The width of the confidence interval estimate is a function of the confidence level, the population standard deviation, and the sample size…A larger confidence levelproduces a w i d e rconfidence interval.
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- Spring '11