The interquartile vary (IQR) is a measure of variability, or how unfold out an information set is. It’s calculated by subtracting the primary quartile (Q1) from the third quartile (Q3). The IQR can be utilized to determine outliers, that are knowledge factors which might be considerably totally different from the remainder of the information set.
The IQR is a helpful statistic as a result of it isn’t affected by outliers. This makes it a extra dependable measure of variability than the vary, which is just the distinction between the biggest and smallest values in an information set.