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The variability of the time to serve in Domino's facility is of concern. A random sample of 20 customers shows a mean time to be

The variability of the time to serve in Domino's facility is of concern. A random sample of 20 customers shows a mean time to be served X bar of 0.5 hours with a standard deviation s of 0.1 hours. Can we conclude that the variance of time to serve is less is than 0.5? Use a level of significance of 0.05.

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