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Analysis of tomato root initiation using a normal mixture distribution

, : Analysis of tomato root initiation using a normal mixture distribution. Biometrics 51(4): 1461-1468

We attempt to identify the number of underlying physical phenomena behind tomato lateral root initiation by using a normal mixture distribution coupled with the Box-Cox power transformation. An initial analysis of the data suggested the possibility of two (possibly more) subpopulations, 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 sample sizes can detect the unbalanced mixtures one might expect with data of this type.


PMID: 8589233

DOI: 10.2307/2533276

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