SOLUTION: Ok scores on an IQ test are normally distributed. The mean is 100 adn the standard deviation is 15. If 6000 people took the test, how many of them scored between 85 and 180?
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-> SOLUTION: Ok scores on an IQ test are normally distributed. The mean is 100 adn the standard deviation is 15. If 6000 people took the test, how many of them scored between 85 and 180?
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Question 195853: Ok scores on an IQ test are normally distributed. The mean is 100 adn the standard deviation is 15. If 6000 people took the test, how many of them scored between 85 and 180? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! scores on an IQ test are normally distributed. The mean is 100 adn the standard deviation is 15. If 6000 people took the test, how many of them scored between 85 and 180?
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Find the percentage of normaly distributed population, with mean
100 and sd = 15, with scores between 85 and 180
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normalcdf(85,180,100,15) = 0.8413
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Find that percent of 6000
x = 0.8413*6000 = 5048
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Cheers,
Stan H.
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