SOLUTION: assume that adults have IQ scores that are normally distributed with a mean of 101 and standard deviation of 15. Find quartile 3 which is the IQ score seperating the top 25% from t
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Question 522259: assume that adults have IQ scores that are normally distributed with a mean of 101 and standard deviation of 15. Find quartile 3 which is the IQ score seperating the top 25% from the others Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! assume that adults have IQ scores that are normally distributed with a mean of 101 and standard deviation of 15. Find quartile 3 which is the IQ score seperating the top 25% from the others
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Find the z-value that has a left-tail of 0.75.
invNorm(0.75) = 0.6745
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Find the corresponding score value using x = zs+u
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x = .6745*15+101 = 111.12
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Cheers,
Stan H.
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