dispersion index

dispersion index

[di′spər·zhən ‚in‚deks]
(statistics)
Statistics used to determine the homogeneity of a set of samples.
References in periodicals archive ?
The variance: mean ratio of parasite abundance (dispersion index) was used to determine spatial distribution patterns and was tested by the statistical index d.
First, their dispersion index may belittle the role of allocative shocks (Shaw 1989).
A dispersion index was estimated for each point in the two-dimensional space (vocalization/silence), which accounts for its distance from a reference point (centroid).
Figure 6a shows the correlation between the maximum UV absorption coefficient [[epsilon].sub.mUV] and the rheological dispersion index, 1/[alpha].
Use of the disclosed methods yields a rubber composition with improved properties including an improved dispersion index after master batch mixing as compared to the same rubber composition mixed using standard four-wing mixers.
En efecto, los tres parametros de dispersion, del metodo de los cuadrados (Dispersion index, Lefkovith's index y Quadrat count) utilizados para establecer el tipo de distribucion de las celulas apoptoticas en la INL y GCL, tanto en la periferia como en la region central de la retina confirman ese tipo de distribucion de las celulas TUNEL+, excepto en la INL de la retina central, que no sigue una distribucion regular.
A unique 'dispersion index' quantifies the state of dispersion of any given sample.
Also, for each stage and dispersion index, the coefficient of determination ([r.sup.2]) was near 1 indicating a good fit.
Individual group size data was used for calculation of dispersion index (variance/mean: 1 = random dispersion, less than 1 = uniform, less than 1 = clumped; Odum, 1971).
Exponent k of the negative binomial distribution: the exponent k is a suitable dispersion index when the size and numbers of sample units are the same in each sample, since this is frequently influenced by the size of the sampling units.
(1), (2) The novelty in our approach is that we introduce a new power dispersion index which is suitable for the conditions of Turkey and probably for other developing countries that have fragmented fiscal authorities under the coalition governments.