Mathematics, 06.11.2019 20:31 cancerbaby209

An automotive repair shop has determined that the average service time on an automobile is 120 minutes with a standard deviation of 32 minutes. a random sample of services is selected. a. what is the probability that the sample of 64 services will have a mean service time greater than 114 minutes? b. what is the probability that a sample of 256 services will have a mean service time greater than 114 minutes? c. why are the answers to parts a. and b. different?

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