View Interquartile Range Box Plot Khan Academy Photos. In descriptive statistics, the interquartile range (iqr), also called the midspread, middle 50%, or h‑spread, is a measure of statistical dispersion. The distance between the first and third quartiles of a data set.

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While the above examples gave you a taste of the use of quartiles, box and whisker plots will show how you can use quartiles and interquartile range to represent, interpret and compare data. I was hoping to find a way to plot upper and lower interquartile ranges. The most simple measure of variability is the range.

Is there any full documentation for this function to check how it is plotting iqrs?

That's because the interquartile range doesn't take outliers into account; Why one and a half times the width of the box for the outliers? It is the difference between the highest and the lowest value. Do box plots show outliers?