Question: The paper referenced in Example 7 16 Estimating Waste Transfer Station

The paper referenced in Example 7.16 (“Estimating Waste Transfer Station Delays Using GPS,” Waste Management [2008]: 1742–1750) describing processing times for garbage trucks also provided information on processing times at a second facility. At this second facility, the mean total processing time was 9.9 minutes and the standard deviation of the processing times was 6.2 minutes. Explain why a normal distribution with mean 9.9 and standard deviation 6.2 would not be an appropriate model for the probability distribution of the variable x = total processing time of a randomly selected truck entering this second facility.

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