understanding z scores
Post on 24-Feb-2016
40 Views
Preview:
DESCRIPTION
Understanding z scores. Standard scores. Standard scores assume a normal distribution They provide a method of expressing any score in a distribution in terms of its distance from the mean in standard deviation units. Z-score. A raw score by itself is rather meaningless. - PowerPoint PPT Presentation
TRANSCRIPT
Understanding z scores
Understanding z scores
Standard scoresStandard scores assume a normal distributionThey provide a method of expressing any score in a distribution in terms of its distance from the mean in standard deviation units2
Z-scoreA raw score by itself is rather meaningless.What gives the score meaning is its deviation from the meanA Z score expresses this value in standard deviation units3
Z-score
4Raw score
Mean
Standard deviation
Z score formula
5
Z score computation
6
top related