Posted by Penny on .
how do i calculate the SAT score that defines the bottom 3% of students with a mean of 500 and standard deviation of 100

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 (.0300) related to the Z score. Insert the values into the above equation to find the score.