ANALYSIS OF TOMATO ROOT INITIATION USING A NORMAL MIXTURE DISTRIBUTION

Citation
Rg. Gutierrez et al., ANALYSIS OF TOMATO ROOT INITIATION USING A NORMAL MIXTURE DISTRIBUTION, Biometrics, 51(4), 1995, pp. 1461-1468
Citations number
18
Categorie Soggetti
Statistic & Probability","Statistic & Probability
Journal title
ISSN journal
0006341X
Volume
51
Issue
4
Year of publication
1995
Pages
1461 - 1468
Database
ISI
SICI code
0006-341X(1995)51:4<1461:AOTRIU>2.0.ZU;2-X
Abstract
We attempt to identify the number of underlying physical phenomena beh ind tomato lateral root initiation by using a normal mixture distribut ion coupled with the Box-Cox power transformation. An initial analysis of the data suggested the possibility of two (possibly more) subpopul ations, but upon taking reciprocals, the data appear to be very nearly Gaussian. A simulation study explores the possibility of erroneously detecting a second subpopulation by fitting data which are improperly scaled. A power calculation suggests that only unrealistically large s ample sizes can detect the unbalanced mixtures one might expect with d ata of this type.