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Suppose that the average weekly earnings for employees in general automotive repair shops is $450, and that the standard deviation for the weekly...
Suppose that the average weekly earnings for employees in general automotive repair shops is $450, and that the standard deviation for the weekly earnings for such employees is $50. A sample of 100 such employees is selected at random. Find probability that the mean of the sample is less than $445. Place your answer, rounded to 4 decimal places