SOLUTION: The average hourly wage of workers at a fast food restaurant is $7.75. Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this fast food r

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Question 695878: The average hourly wage of workers at a fast food restaurant is $7.75. Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than $7.50 per hour?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The average hourly wage of workers at a fast food restaurant is $7.75. Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than $7.50 per hour?
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z(7.5) = (7.5-7.75)/0.45 = -0.5556
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P(x > 7.50) = P(z > -0.5556) = 0.7107
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Cheers,
Stan H.