SOLUTION: assume that adults have iq scores that are normally with a mean of 105 and a standard deviation of 15. Find P14 which is the iq score separating the bottom 14% from the top 86%

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Question 736116: assume that adults have iq scores that are normally with a mean of 105 and a standard deviation of 15. Find P14 which is the iq score separating the bottom 14% from the top 86%
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
assume that adults have iq scores that are normally with a mean of 105 and a standard deviation of 15. Find P14 which is the iq score separating the bottom 14% from the top 86%
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Draw the picture on a normal curve so you can see what is happening.
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Find the z-value that has a left tail of 14%: invNorm(0.14) = -1.0803
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Find the corresponding score using x = z*s + u
x = -1.0803*15+105 = 88.80
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Cheers,
Stan H.