About
The deviation score is the difference between two scores as :
- a value <math>X</math>
- and an other value (usually the predicted score: mean, …)
See also:
- for a sample, Statistics - ( Spread | Variability ) of a sample
- for a measurement, Statistics - (Interval|Delta) (Measurement)
Articles Related
Example
- the mean <math>\bar{X}</math> of a distribution for the calculation of the correlation coefficient
- or a predicted variable for the calculation of a regression coefficient
Deviation Form
By putting all scores of a variable in a deviation form, the average for this variable will be equal to zero. It's called centering.
To center means to put in deviation form.