v3102D【初級編D】決定木分析

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StatsGuild Inc. index-1 【初級編D】決定木分析 Chapter 1 決定木分析の概要................................................................................................................................1 Chapter 2 CHAIDによる決定木分析－分類ツリー................................................................................ 37 1.1.1 決定木分析の概要 .........................................................................................................................2 1.1.2 独立変数と従属変数 .....................................................................................................................3 1.1.3 決定木分析の用途 .........................................................................................................................4 1.1.4 ツリー図の基本的な用語 ............................................................................................................7 1.1.5 決定木分析の手法 .........................................................................................................................8 1.1.6 分類ツリーと回帰ツリー ......................................................................................................... 10 1.1.7 モデルの検証 ............................................................................................................................... 11 1.2.1 サンプルデータの確認.............................................................................................................. 12 1.2.2 オプションの設定 ...................................................................................................................... 14 1.3.1 決定木分析の実行 ...................................................................................................................... 17 1.3.2 結果の解釈－ツリー図－ ......................................................................................................... 22 1.3.3 結果の解釈－分類ルール－..................................................................................................... 26 1.3.4 結果の解釈－ノードのゲイン－............................................................................................ 28 1.3.5 結果の解釈－分類の精度－..................................................................................................... 30 1.4.1 ツリー図の表示形式の変更..................................................................................................... 31 2.1.1 CHAIDの概要............................................................................................................................... 38 2.1.2 仮説検定 ........................................................................................................................................ 39 2.1.3 カイ2乗検定と有意確率 ........................................................................................................... 40 2.1.4 独立変数のカテゴリの結合..................................................................................................... 41 2.2.1 サンプルデータの確認.............................................................................................................. 43 2.3.1 記述統計の実行 ........................................................................................................................... 44 2.3.2 記述統計の結果の解釈.............................................................................................................. 45 2.4.1 CHAIDによる決定木分析の実行－分類ツリー－ ............................................................ 46 2.4.2 結果の解釈－ツリー図－ ......................................................................................................... 57 2.4.3 結果の解釈－分類ルール－..................................................................................................... 62 2.4.4 結果の解釈－ノードのゲイン－............................................................................................ 64 2.4.5 結果の解釈－分類の精度－..................................................................................................... 66 2.5.1 分類ルールの活用－ .................................................................................................................. 67