SOLUTION: Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation 20. Find P10​, which is the IQ score separating the bott

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Question 1044403: Assume that adults have IQ scores that are normally distributed with a mean of
105
and a standard deviation
20.
Find P10​,
which is the IQ score separating the bottom
10​%
from the top
90​%.

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z(0.10)=-1.28
-1.28=(x-105)/20
-25.6=x-105
x=79.4 or 79