Bootstrap confidence intervals for service center call

Chapter , Problem 16.47

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Bootstrap confidence intervals for service center call lengths. The distribution of the call center lengths that you used in Exercise 16.25 (page 16-23) is strongly skewed. In that exercise you found a bootstrap t confidence interval for the population mean m, even though some skewness remains in the bootstrap distribution. Bootstrap the mean length and give all three bootstrap 95% confidence intervals: t, percentile, and BCa. Make a graphical comparison by drawing a vertical line at the original sample mean x and displaying the three intervals horizontally, one above the other. Discuss what you see: Do bootstrap t and percentile agree? Does the more accurate interval agree with the two simpler methods?

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