|Title of host publication||International Encyclopedia of the Social & Behavioral Sciences|
|Publisher||Elsevier Science Ltd.|
|State||Published - 2001|
Mixture models are a discrete or continuous weighted combination of distributions aimed at representing a heterogeneous population comprising of several (two or more) distinct subpopulations. Such models are often used to approximate nonstandard distributions when the underlying population can be regarded as homogenous. A mathematical definition of mixture models is provided, several of the diverse applications of such models are outlined, and the main methods of estimating the model's parameters are discussed.