"X Squared" typically refers to the mathematical expression X^2, which means a number X multiplied by itself. This operation is known as squaring a number and is a fundamental concept in algebra. Squaring is used in various mathematical applications, including geometry, statistics, and physics. In statistics, the term "X Squared" can also refer to the Chi-Squared test, a method used to determine if there is a significant association between categorical variables. This test compares observed data with expected data to assess how well the observed distribution fits the expected distribution.