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    Population Mean of Waiting Time Analysis

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    You are the manager of a restaurant for a fast food franchise. Last month, the mean waiting time at the drive-through window, as measured from the time a customer places an order until the time the customer receives the order, was 3.7 minutes. The franchise helped you institute a new process intended to reduce waiting time. You select a random sample of 64 orders. The sample mean waiting time is 3.57 minutes with a sample standard deviation of 0.8 minute. At the 0.5 level of significance, is there evidence that the population mean waiting time is now less than 3.7 minutes?

    Please show all work, and any graphs if needed.

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    https://brainmass.com/statistics/hypothesis-testing/population-mean-of-waiting-time-analysis-158383

    Solution Preview

    You are the manager of a restaurant for a fast food franchise. Last mnth, the mean waiting time at the drive-through window, as measured from the time a customer places an order until the time the customer receives the order, was 3.7 minutes. The franchise helped you institute a new process intended to reduce waiting ...

    Solution Summary

    This solution presents the null and alternative hypothesis and calculates the z-test statistic to compare to the p-value. A decision is made to accept or reject the null hypothesis.

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