29. Effect of an Outlier Test the effect of an outlier as follows: Use the sample data from Exercise 22 to find a 95% confidence interval estimate of the population mean, after changing the last age from 54 years to 540 years. This value is not realistic, but such an error can easily occur during a data entry process. Does the confidence interval change much when 54 years is changed to 540 years? Are confidence interval limits

>

7-5 Estimating a Population Variance 363 sensitive to outliers? How should you handle outliers when they are found in sample data sets that will be used for the construction of confidence intervals?