Factor effects on the variance in a replicated two-way treatment structure in an agricultural system


OZAYDIN F. , VanLeeuwen D. M. , Miller C., Schroeder J.

JOURNAL OF AGRICULTURAL BIOLOGICAL AND ENVIRONMENTAL STATISTICS, cilt.4, ss.166-184, 1999 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 4 Konu: 2
  • Basım Tarihi: 1999
  • Doi Numarası: 10.2307/1400595
  • Dergi Adı: JOURNAL OF AGRICULTURAL BIOLOGICAL AND ENVIRONMENTAL STATISTICS
  • Sayfa Sayısı: ss.166-184

Özet

We consider methods for drawing inference to factor effects on response variability in factorial designs. Levene's test, the jackknife test, and Fligner and Killeen's test for heterogeneity of variance an generalized to factorial designs. Application of these analyses to the 2 by 2 factorial design is examined in detail. A simulation study examines and compares power and robustness properties of the tests. Based on these simulations, variants of both Fligner and Killeen's test and Levene's test are recommended. An example illustrates the usefulness of these tests in understanding data from a multifactor agricultural system that includes chile, nematodes, and yellow nutsedge.