Lower Quartile Range Formula. Here the average needs to be taken which is of 2 nd and 3 rd terms which are 45 and 50 and the average formula of same is 45 50 2 47 50. The interquartile range iqr is the spread of the middle 50 of the data values.
What it basically means is that in a data set with n data points. Lower quartile q1 n 1 1 4. The lower quartile is the third term which is 6.
In order to calculate this value we must first understand what the lower quartile median and upper quartile are.
If a data set of scores is arranged in ascending order of magnitude then. Third quartile q 3 3 n 1 4 t h t e r m also known as the upper quartile. Formula for interquartile range q3 upper quartile q1 lower quartile. Let s use the formula to find the lower quartile.
