SOLUTION: at a large department store, the average number of years of service was 13.5 with a standard deviation of 6.2 years. If an employee is picked at random, what is the probability tha

Question 636970: at a large department store, the average number of years of service was 13.5 with a standard deviation of 6.2 years. If an employee is picked at random, what is the probability that the employee has worked for the company between 10 and 17 years?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
at a large department store, the average number of years of service was 13.5 with a standard deviation of 6.2 years. If an employee is picked at random, what is the probability that the employee has worked for the company between 10 and 17 years?
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z(10) = (10-13.5)/6.2 = -0.5645
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z(17) = (17-13.5)/6.2 = 0.5645
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P(10 < x < 17) = P(-0.5645 < z < 0.5645) = 0.4276
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Cheers,
Stan H.
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