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Procedures for testing hypotheses about parameters in a population described by a specified distributional form, often, a normal distribution. Student’s t test

A hypothesis concerning the parameter(s) of a distribution. For example, the hypothesis that the mean of a population equals the mean of

Information processing involving a large number of units working contemporaneously in parallel with units, like the neurons of the brain, exciting or inhibiting

A simple but powerful technique for obtaining a graphical display of multivariate data. In this plot, the variable axes are arranged horizontally,

A study in which a group of people, the ‘panel’, are interviewed or surveyed with respect to some topic of interest on

Two samples of observations with the characteristic feature that each observation in one sample has one and only one matching observation in

Data arising when an investigator records whether a particular character istic is present or absent at two sites on the same individual.

A design which can reduce selection bias in situations where it is not possible to use random allocation of subjects to treatments.

A model with more parameters than observations for estimation.