Lower And Upper Quartile Formula. Lower quartile or first quartile median or second quartile upper quartile or third quartile interquartile range upper quartile lower quartile 39 13 26. N 1 1 4 th term is the lower quartile.
First lets arrange of the values in an ascending order. The formula for quartiles is given by. Range largest value smallest value 65 5 60.
19 20 21 23 23 24 25 27 31.
Average of 2nd and 3rd terms. 20 21 2 20 5 lower quartile. Range largest value smallest value 65 5 60. Upper quartile q3 n 1 3 4.
