Posted by Beth on .
Suppose IQ scores have a bellshaped distribution with a mean of 100 and a standard deviation of 15. What percentage of the scores are above 130?

statistics 
PsyDAG,
Z = (scoremean)/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. Multiply by 100 to get percentage.