Analysis of tomato root initiation using a normal mixture distribution.

نویسندگان

  • R G Gutierrez
  • R J Carroll
  • N Wang
  • G H Lee
  • B H Taylor
چکیده

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.

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عنوان ژورنال:
  • Biometrics

دوره 51 4  شماره 

صفحات  -

تاریخ انتشار 1995