3. The owners of Sparkle Auto Wash believe that they can reduce the mean time even further...

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3. The owners of Sparkle Auto Wash believe that they can reduce the mean time even further by training employees to be more efficient at determining which level of wash customers want, collecting payment, and starting the automatic track. Their goal is to reduce service time to 3.0 minutes. Using this service time, recompute the values you found in problems | and 2, and compare the results.

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