SOLUTION: College students average 7 hours of sleep per night with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of college students sle
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Question 277886: College students average 7 hours of sleep per night with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 8.3 hours?
Probability = Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! College students average 7 hours of sleep per night with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 8.3 hours?
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z(8.3) = (8.3-7)/(2/3) = 1.95
P(x> 8.3) = P(z > 1.95) = 0.0256
Probability =0.0256
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Cheers,
Stan H.
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