Asked by samantha

assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. find the probability that a randomly selected adult has an IQ less than 20.

13 years ago

Answered by Ms. Sue

http://www.iqcomparisonsite.com/IQBasics.aspx

13 years ago

Answered by PsyDAG

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

13 years ago

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