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An aspect of Brownian motion dealing with the velocity of the movement of a particle.

The process of reducing the dimensionality (i.e. the number of variables) of multivariate data by deriving a small number of new variables

A hypothesis that specifies an order for a set of parameters of interest as an alternative to their equality, rather than simply

A name given to methods for estimating the regression parameters in models fitted to high dimensional data that have the property that

A scheme of measurement used in situations investigating possible changes over time in longitudinal data. The scheme is designed to prevent measurement

Procedures for finding the maxima or minima of functions of, generally, several variables. Most often encountered in statistics in the context of

The process of simultaneously transforming proximity data and representing the transformed data by a geometrical (often a Euclidean distance) model.

A procedure that aims to ascertain opinions possessed by members of some population with regard to particular topics.

Research concerned with applying scientific methods to the problems facing executive and administrative authorities.