Variability | Calculating Range, IQR, Variance, Standard Deviation Variability describes how far apart data points lie from each other and from the center of a distribution Along with measures of central tendency, measures of variability give you descriptive statistics that summarize your data Variability is also referred to as spread, scatter or dispersion It is most commonly measured with the following:
Measures of Variability: Range, Interquartile Range, Variance, and . . . Variability for categorical variables is rarely used, but a form of it does exist It’s fairly different than dispersion for continuous data There is a coefficient of unalikeability, which measures how similar or dissimilar the outcome values are for categorical data Unalikeability assesses how often observations differ from one another