Abstract
This article concernsi) the stochastic behavior of the Box-Cox transformation estimator andii) the effect of estimating a transformation on the Box-CoxT-ratio used for the post-transformation analysis. It is shown that the transformation estimator depends on three factors: the model structure, the mean-spread and the error standard deviation σ0. In general, a structured model is able to estimate the transformation very well; an unstructured model can do well also unless the mean-spread and σ0 are both small; and a one-mean mode can give a poor-estimate if σ0 is small. When the sample is not large, it is shown that the unconditional effect of estimating a transformation on the Box-CoxT-ratio is generally small, and the “conditional” effect is also negligible in most of the situations except the case of one-way ANOVA with small σ0. Extensive Monte Carlo simulations are performed to support the theoretical findings.
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Yang, Z. Estimating a transformation and its effect on Box-CoxT-ratio. Test 8, 167–190 (1999). https://doi.org/10.1007/BF02595868
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DOI: https://doi.org/10.1007/BF02595868