Posted by angie on .
Given a data set with the mean = 44 and the standard deviation = 15, what is the value of the Third Quartile?
Third Quartile = 75th percentile
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z score = 75th percentile. Put the appropriate values into this equation to solve for the score.
Z = (score-mean)/SD