Posted by Abigail on Monday, April 29, 2013 at 11:21am.
the scoring of IQ tests is designed so that the scores of the test taking population are normally distributed with a mean of 100 and a standard dev of 15.
what percent of the population have an IQ less than 92?
how do i figure this out?

Statistics  PsyDAG, Monday, April 29, 2013 at 2:14pm
Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. Multiply by 100.