The Internal Revenue Service claims that the mean wait time for callers during a recent tax...

 

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The Internal Revenue Service 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 a significance level of 0.10? a ) H, μ 7 H: u>7 b) test statistic:t= 2.088 c) P-value: 0.0316 d) Conclusion: Reject the Null Hypothesis. The test is significant. e) Interpretation: There is evidence to believe that the mean waiting time is greater than 7 minutes. The Internal Revenue Service 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 a significance level of 0.10? a ) H, μ 7 H: u>7 b) test statistic:t= 2.088 c) P-value: 0.0316 d) Conclusion: Reject the Null Hypothesis. The test is significant. e) Interpretation: There is evidence to believe that the mean waiting time is greater than 7 minutes.