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Some Comments on the Use of Response Variable Transformations in Empirical Modelling

J. R. Buxton
Journal of the Royal Statistical Society. Series C (Applied Statistics)
Vol. 40, No. 3 (1991), pp. 391-400
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2347519
Stable URL: http://www.jstor.org/stable/2347519
Page Count: 10
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Some Comments on the Use of Response Variable Transformations in Empirical Modelling
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Abstract

This paper illustrates some practical difficulties that can arise when response transformations are used in empirical modelling. The ideas are discussed in the context of an investigation into the welding of high density polyethylene. Transformation of the response seems to be strongly indicated but leads to a model with a rather poor fit; this is attributed partly to the effects of the rather extreme variance function implied by the application of the transformation to the observed responses. Informal inspection of the data, together with the analysis of subsets, leads to a more meaningful and better fitting model. The paper concludes with a brief discussion of the effect of transformation on the ease of interpretation of a model.

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