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OpenStudy (anonymous):
What is the probability a randomly chosen person has an IQ between 90 and 110?
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OpenStudy (anonymous):
hmmm use a calculator, as that is less the one standard deviation from the mean. I can tell you now its less then 67%
OpenStudy (anonymous):
also does it say the standard deviation? ive assumed its 15 as that is the standard deviation of most IQ tests
OpenStudy (anonymous):
@Posideon its just probabiltiy
OpenStudy (anonymous):
you have to use a calculator as it a gaussian curve.
OpenStudy (anonymous):
or a table of z values
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OpenStudy (unklerhaukus):
Posideon is right
OpenStudy (unklerhaukus):
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