Find a confidence interval for the average time required

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Problem: The distribution center manager at internet distributor Plastik Parts Warehouse wants to find a confidence interval for the average time required for an associate to fill an order for shipment. A sample of 25 orders is taken and the mean time was found to be 9.0 minutes, with a standard deviation of 2.9 minutes. Compute 95 percent and 99 percent confidence intervals. Which one is larger? Explain why.

Reference no: EM133595496

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