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Nonconstancy of the variance of a measure over the levels of the factor under study.
[hetero + G. skedastikos, pertaining to scattering, fr. skedannumi, to scatter]
References in periodicals archive ?
Shoot abundance data were square-root transformed and plant biomass data were log transformed before analysis to eliminate heteroscadacity. Shoot density, above-ground biomass, and below-ground biomass were compared between months and within habitats (e.g., edge vs.
Tests for normality of the residuals and Levene's tests for heteroscadacity of variance were performed.