Quartile Deviation for ungrouped data
Use this calculator to find the Quartile Deviation (QD) for ungrouped (raw) data.
| Quartile Deviation Calculator | |
|---|---|
| Enter the X Values (Separated by comma,) | |
| Results | |
| Number of Obs. (n): | |
| Ascending order of X values : | |
| First Quartile :$Q_1$ | |
| Second Quartile :$Q_2$ | |
| Third Quartile :$Q_3$ | |
| Quartile Deviation :$QD$ | |
| Coeff. of QD : | |
Quartile Deviation for ungrouped data
Formula
The quartile deviation is given by
$QD=\dfrac{Q_3-Q_1}{2}$
and the coefficient of quartile deviation is given by
Coeff. of $QD=\dfrac{Q_3-Q_1}{Q_3+Q_1}$
where
- $Q_1$ is the first quartile of the data
- $Q_3$ is the third quartile of the data
