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Callers during tax season-callers during tax season

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Reference no: EM13277289

The IRS claims that the mean wait time for callers during tax season was 7min. A random sample of 11 callers has a mean wait time of 8.7min and a standard deviation of 2.7min. Test the claim at the 10% significance. Use rejection regions.

Reference no: EM13277289

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