Quartiles
		
		
		
		Jump to navigation
		Jump to search
		
Four groups of equal size, where the groups are defined as:
- Less than the 25th percentile
 - Between the 25th percentile and the median
 - Between the median and the 75th percentile
 - Greater than the 75th percentile
 
There is no standard treatment for observations that are exactly equal the the 25th, 50th or 75th percentiles.