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Finding standard error of mean

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Q1) An automotive repair shop has find out that average service thime on automobile is 2 hours with standard deviation of 32 minutes. A random sample of 64 services is selected. Determine the probability that sample of 64 will have mean service time greater than 114 minutes    

Q2) Automotive repair shop has find out that average service time on automobile is 2 hours with standard deviation of 32 minutes. Random sample of 64 services is selected. Assume the population consists of 400 services. Find out the standard error of mean.

Reference no: EM1319127

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