頁籤選單縮合
題 名 | Some Association Measures and Their Collapsibility |
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作 者 | Xie, Xianchao; Ma, Zongming; Geng, Zhi; | 書刊名 | Statistica Sinica |
卷 期 | 18:3 2008.07[民97.07] |
頁 次 | 頁1165-1183 |
分類號 | 319 |
關鍵詞 | Association measure; Collapsibility; Yule-Simpson paradox; |
語 文 | 英文(English) |
英文摘要 | Abstract: For two variables X and Y with arbitrary distributions, we consider three general association measures, the mixed derivative of interaction, the partial derivative of the conditional distribution function and the partial derivative of the conditional expectation. The sign of an association measure between X and Y may sometimes be reversed after marginalization over a third variable W. In this paper, we first compare the stringency of these measures for evaluating a positive association. Then we present the condition for avoiding the effect reversal after marginalization over W. Further we show that a modification of the condition can be used for collapsibility of the association measures over W. |
本系統中英文摘要資訊取自各篇刊載內容。