The term "n-2" is often used in mathematics and computer science to denote a value that is two less than a given number, represented by "n." For example, if n equals 5, then n-2 would equal 3. This concept is commonly applied in various calculations, such as determining indices in programming or solving equations. In statistics, "n" typically represents the number of observations in a dataset. Therefore, "n-2" might refer to the degrees of freedom in certain statistical tests, such as the t-test or ANOVA, where it helps in calculating critical values and understanding variability within the data.