A human resources specialist has compiled annual numbers of person-days of work lost, due to work stoppages,
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n = 40 = 38,015.7 median = 18,240.0 s = 49,288.8
a. Construct a 96% confidence interval estimate for the population mean of annual numbers of person-days lost.
b. Why can we not use the methods of Section 6-5 to construct confidence interval estimates of the population standard deviation?
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