How to standardise scale variables with different ranges?

#1
Hello!
I have some variables which are scale but their limits vary. Namely, the one has range from 1 to 30, the other from 2 to 5, and so on.
Is there any way to tranform them (or recompute them) in such a way that they will be standardised and will all have the same range? :confused:
 

jpkelley

TS Contributor
#2
Check out z-score on Wikipedia (LINK). Since the transformation is dependent on the mean and standard deviation, you might consider performing transformations of the raw data to make them normal.
 

CB

Super Moderator
#3
I agree that z-scores could be useful here. Go Analyze > Descriptive Statistics > Descriptives, then select whichever variables you want, choose some kind of descriptive statistic of interest to allow the dialog to run, and tick the "Save standardized values as variables" box.