IQR Formula
InterQuartile Range (IQR) = Third Quartile (Q3) - First Quartile (Q1)
Example of Interquartile range(IQR):
| n | x[n] | Median | Quartile |
|---|---|---|---|
| 1 | 7 | Q2=77 (median of whole table) |
Q1=33 (median of upper half, from row 1 to 6) |
| 2 | 7 | ||
| 3 | 33 | ||
| 4 | 33 | ||
| 5 | 47 | ||
| 6 | 75 | ||
| 7 | 77 | ||
| 8 | 115 | ||
| Q3=133 (median of lower half, from row 8 to 13) |
|||
| 9 | 116 | ||
| 10 | 133 | ||
| 11 | 133 | ||
| 12 | 155 | ||
| 13 | 177 |