Find probability that sample mean waiting time will exceed

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A random sample of 36 waiting times, T, will be taken from a system where the mean waiting time is assumed to be 100 hours and the standard deviation waiting time is assumed to be 12 hours. If these two assumptions are correct, then what is the probability that the sample mean waiting time,T, based on your random sample of size n=36, will exceed 104 hours?

Reference no: EM13144792

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