Poisson index of dispersion

Poisson index of dispersion

[¦pwä·sōn¦in‚deks əv di′spər·zhən]
(statistics)
An index used for events which follow a Poisson distribution and should have a chi-square distribution.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Fisher (1950) and Moran (1973), among others, suggested the use of the Poisson index of dispersion based on the first two moments of the sample: