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The Initial Examination of Data

C. Chatfield
Journal of the Royal Statistical Society. Series A (General)
Vol. 148, No. 3 (1985), pp. 214-253
Published by: Wiley for the Royal Statistical Society
DOI: 10.2307/2981969
Stable URL: http://www.jstor.org/stable/2981969
Page Count: 40
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Abstract

The initial examination of data (abbreviated IDA) is a valuable stage of most statistical investigations, not only for scrutinizing and summarizing data, but also for model formulation. Several examples are presented to illustrate the benefits of IDA, particularly that IDA may be all that is necessary or desirable. In particular, a re-analysis of the notorious teaching styles data produces completely different conclusions to earlier studies. A critical comparison is made between IDA and Tukey's exploratory data analysis approach. Some reasons why IDA is often neglected or undervalued are discussed and countered. Some implications for the teaching of Statistics are considered.

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