SOLUTION: Given a mean (8.0 hours) and a standard deviation (4.5 hours) of a population, calculate the probability of an event that falls between 5 to 10 hours. This question is due on day

Question 127276: Given a mean (8.0 hours) and a standard deviation (4.5 hours) of a population, calculate the probability of an event that falls between 5 to 10 hours. This question is due on day 5.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Given a mean (8.0 hours) and a standard deviation (4.5 hours) of a population, calculate the probability of an event that falls between 5 to 10 hours. This question is due on day 5.
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Find the z-score of 5 and of 10:
z(5) = (5-8)/4.5 = -3/4.5 = -1/1.5 = -0.667
z(10)= (10-8)/4.5 = 2/4.5 = 0.4444
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Use your z-chart or your calculator to find the following:
Probability (5<=x<=10) = P(-0.667 <= z <= 0.444) = 0.4191
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Cheers,
Stan H.
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