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Is there enough evidence to reject the claim

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Reference no: EM131094200

The IRS claims that the mean wait time for callers during tax season is at most 7 minutes. A random sample of 11 callers has a mean wait time of 8.7 minutes and a standard deviation of 2.7 minutes. Is there enough evidence to reject the claim at alpha=0.1?

Reference no: EM131094200

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