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In a certain region the mean annual salary for plumbers is

In a certain region, the mean annual salary for plumbers is $51,000. Let x be a random variable that represents a plumber's salary. Assume the standard deviation is $1300. If a random sample of 100 plumbers is selected, what is the probability that the sample mean is greater than $51,300?

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Basic Statistics: In a certain region the mean annual salary for plumbers is

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