Find The Lower Quartile Of The Data Set. And the Interquartile Range is. First arrange the data in ascending order.
The first quartile will be equal to the median of these values. Median of the data set. Approximately one quarter or 25 of the data is less than Q 1.
Find the median - you will do this so that you can find the midpoint of the data set half of of the data is smaller and half of the data is larger.
The upper quartile Q 3 is the median of the upper half of the data. Aug 04 2015 To find the highest and lowest quartiles in a data set first find the median of the entire set of numbers. The third quartile or 75th percentile x H Q 3 is the value such that 75 of the observations are less than x H. As explained within instruction the number should be separated by commas space or break line.
