Interquartile range, also known as IQR, is a statistical measure that is widely used in data analysis. The IQR is determined by subtracting the first quartile from the third quartile. In other words, it's the middle 50% of a set of data. Synonyms for the interquartile range include midspread, midquartile range, and H-spread. Additionally, it's often referred to as the Tukey's Hinges and the Tukey's Range. The concept of IQR plays a crucial role in identifying outliers and determining the degree of spread in a dataset. Using synonyms for interquartile range could help make statistical analysis more accessible and help to simplify the communication of complex data analysis concepts.