Calculate First Quartile. Since we are dealing with a quarter of the original set this median of the bottom half of the data is called the first quartile and is denoted by Q1. Find the first and third quartiles of the set 3 7 8 5 12 14 21 15 18 14.
Similarly the upper half of the data is. - first one Q1 which is also called the lower quartile is equal to the data at the 25 th percentile of the given set. Quartile Formula A quartile divides the set of observation into 4 equal parts.
Thus half of half or one quarter of the data would be below this.
Thus half of half or one quarter of the data would be below this. Second quartile is 4 and third quartile is 710. At Q 2 split the ordered data set into two halves. In the example below were going to use a single line of code to get the quartiles of a distribution using R.
