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1. An automotive repair shop has determined that average service time on the automobile is 2 hours with the standard deviation of 32 minutes. A random sample of 64 services is chosen. Find out the probability that the sample of 64 will have the mean service time greater than 114 minutes    

2. An automotive repair shop has determined that average service time on the automobile is 2 hours with standard deviation of 32 minutes. A random sample of 64  services is chosen. Suppose the population consists of 400 sevices. Find out the standard error of mean

Statistics and Probability, Statistics

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