What to tell the city fathers about mean repair cost of car

Reference no: EM13139663

Last year, Normal, Illinois, had all car maintenance on rhe city's automobiles done by the city maintenance pool. The cost was $364 per car. This year, the city fathers fired all the workers in the maintenance pool and are using Jack's Crash Shop ro perform the maintenance. They would like to know, without a complete audit, whether Jack is saving them money. A random sample of 36 cars showed a mean repair cost of $330, with a standard deviation of $120. What can you tell the city fathers?

Reference no: EM13139663

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