Z-Scores
nStandardizes your data distribution
nConvert raw scores into z-scores
nIf X = 10, SD = 2, X = 11.7
n
n z =  11.7 - 10  = 1.7 = .85
n              2            2
nUse z Table to find area under bell curve
n1st column is z-score
n2nd column is proportion between mean and z
n3rd column is proportion in the tail beyond z