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方差分析

方差分析英文analysis of variance,ANOVA)係統計學上一系列用嚟分析唔同組嘅平均值嘅方法。思路如下:假想家陣個研究者想比較三組喺變數 嘅平均值上嘅差異,如果三組之間有顯著嘅差異,噉組之間嘅 方差應該會大過組內部嘅好多。最簡單嘅單因子方差分析(one-way ANOVA)分析一個應變數喺三個或者以上嘅組之間嘅差異(「組」就係自變數),考慮以下嘅數值[1]

原則上, 數值愈大,研究者就愈有理由相信組之間有顯著嘅差異。

睇埋

[編輯]

[編輯]
  1. Howell, David (2002). Statistical Methods for Psychology. Duxbury. pp. 324–325.
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方差分析
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