Statistics & Probability
First Quartile (Q1)
25th percentile of the data.
Formula
Formula
Q1 = P25
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| data | data set | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givendata = 1, 2, 3, 4, 5, 6, 7, 8
Result2.75
Example 2
Givendata = 10, 20, 30, 40
Result17.5