Calculate First Quartile And Third Quartile. The third quartile Q 3 is the median of the upper half not including the value of Q 2. - first one Q1 which is also called the lower quartile is equal to the data at the 25 th percentile of the given set.
First quartile Q 1 25 th percentile second quartile Q 2 50 th percentile third quartile Q 3 75 th percentile Dr. Mathematically it is obtained when the 1st quartile is subtracted from the 3rd quartile. 1 st quartile or lower quartile basically separate the lowest 25 of data from the highest 75.
There are four different formulas to find quartiles.
This is the second quartile Q 2. Order your data set from lowest to highest values. The quartiles are the 25th 50th and 75th percentiles. The first quartile Q1 the second quartile Q2 and the third quartile Q3.
