Asked by joey
How do I find a percentile if I only have the mean and sd? ie...what IQ score is associated with the 65th percentile?-mean is 100 and sd is 15. Thanks in advance :)
Answers
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 (.65) related to the Z score. Insert the values into the equation above and solve for the IQ.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.65) related to the Z score. Insert the values into the equation above and solve for the IQ.
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