Is there enough evidence to reject the claim at alpha value


The IRS claims that the mean wait time for callers during a recent tax filing season was 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 = 0.10?

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Basic Statistics: Is there enough evidence to reject the claim at alpha value
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