Question: how does iqr show variability?
Answer: The interquartile range (IQR) is a measure of variability, based on dividing a data set into quartiles. ... The values that divide each part are called the first, second, and third quartiles; and they are denoted by Q1, Q2, and Q3, respectively. Q1 is the "middle" value in the first half of the rank-ordered data set.