The value of a
Variable
below which a certain percent of
Observation
s fall. For example, the 60
th
percentile is the value below which 60% of the
observations
can be found. Note the following percentile landmarks.
- 25
th
percentile = first quartile = Q
1
- 50
th
percentile = second quartile = median = Q
2
- 75
th
percentile = third quartile = Q
3