So Lower Quartile Q1 29. Understanding the Lower Quartile and the Quartiles. In this case all the quartiles are between numbers.
- first one Q1 which is also called the lower quartile is equal to the data at the 25 th percentile of the given set.
The root of the word quartile is quart which means one fourth. The IQR is the difference between Q3 and Q1. The second quartile Q2 is also the median. Lower quartile The median of the data to the left of the median assuming the data are listed from least value to greatest value.