On the Multivariate Normality of Data Arising from Lead Isotope Fields

Author: Baxter M.J.

Source: Journal of Archaeological Science, Volume 26, Number 1, January 1999 , pp. 117-124(8)

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Abstract:

There has been recent and extensive debate about the analysis and interpretation of lead isotope ratio data in archaeology. This paper addresses the specific technical issue of whether data arising from lead isotope fields can be reasonably modelled by trivariate normal distributions. This assumption underpins much of the statistical analysis of such data. It is argued that the univariate and coordinate dependent approaches that have been used to test for normality need to be complemented with truly multivariate tests. Several such tests are described and applied to seven recently published data sets. The results suggest that non-normality may be the rule rather than the exception. Some of the consequences of this are discussed. Copyright 1999 Academic Press

Language: English

Document Type: Research article

Affiliations: Statistics and Operational Research, The Nottingham Trent University, Nottingham, NG11, 8NS, U.K.

Publication date: 1999-01-01