Question 1010593: In a recent study, it was found that in one town the number of hours that a typical 10-year-old child watches television per week is normally distributed with a mean of 12 hours and a standard deviation of 1.5 hours. If Gary is a typical 10-year-old child in this town, what is the probability that he watches between 9 and 14 hours of television per week?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! In a recent study, it was found that in one town the number of hours that a typical 10-year-old child watches television per week is normally distributed with a mean of 12 hours and a standard deviation of 1.5 hours.
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If Gary is a typical 10-year-old child in this town, what is the probability that he watches between 9 and 14 hours of television per week?
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z(9) = (9-12)/1.5 = -2
z(14) = (14-12)/1.5 = 1 1/3
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P(9 < x < 14) = P(-2 < z < 4/3) = normalcdf(-2,4/3) = 0.8860
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Cheers,
Stan H.
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