Appropriate transformation for the population counts of citrus green scale, Coccus viridis (Green) (Coccidae, Homoptera)

Six transformations viz., , log[log (x + 2)] and log[log (x + k )] were tested for their efficiency in stabilizing variance of Coccus viridis (Green) population counts which followed negative binomial distribution. Only log[log(x + 2)] transformation was found effective in stabilizing variance. This...

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Veröffentlicht in:Insect science and its application 1987-01, Vol.8 (2), p.255-257
Hauptverfasser: Tandon, P. L., Veeresh, G. K.
Format: Artikel
Sprache:eng
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Zusammenfassung:Six transformations viz., , log[log (x + 2)] and log[log (x + k )] were tested for their efficiency in stabilizing variance of Coccus viridis (Green) population counts which followed negative binomial distribution. Only log[log(x + 2)] transformation was found effective in stabilizing variance. This is a new transformation proposed by the authors. Six transformations, á savoir, , log[log(x + 2)], et log[log(x + k)] ont été essayées pour leur efficacité concernant la stabilisation de variance des comptes de populations de Coccus viridis (Green), lequeles ont suivis une distributions binomiale negative. Seule la transformation log[log(x + 2)] s'est trouvée comme efficace pour stabiliser variance. C'est une nouvelle transformation proposée par les auteurs présents.
ISSN:0191-9040
1742-7584
1742-7592
DOI:10.1017/S1742758400007311