v3102D【初級編D】決定木分析

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F検定と有意確率 ........................................................................................................................ 71 StatsGuild Inc. IBM SPSS Statisticsによる統計解析 index-2 Chapter 3 CHAIDによる決定木分析－回帰ツリー................................................................................ 69 Chapter 4 CRTによる決定木分析－分類ツリー ..................................................................................... 91 3.1.1 CHAIDの概要............................................................................................................................... 70 3.1.2 3.1.3 独立変数のカテゴリの結合..................................................................................................... 72 3.2.1 サンプルデータの確認.............................................................................................................. 74 3.3.1 CHAIDによる決定木分析の実行－回帰ツリー－ ............................................................ 75 3.3.2 結果の解釈－ツリー図－ ......................................................................................................... 80 3.3.3 結果の解釈－予測ルール－..................................................................................................... 84 3.3.4 結果の解釈－ノードのゲイン－............................................................................................ 86 3.3.5 結果の解釈－予測の精度 ......................................................................................................... 87 3.4.1 予測値と決定係数の確認 ......................................................................................................... 88 4.1.1 CRT分類ツリーの概要.............................................................................................................. 92 4.1.2 不純度............................................................................................................................................. 93 4.1.3 改善度............................................................................................................................................. 94 4.1.4 CRTツリーの剪定....................................................................................................................... 95 4.1.5 独立変数のカテゴリの結合..................................................................................................... 96 4.2.1 サンプルデータの確認.............................................................................................................. 98 4.3.1 CRTによる決定木分析の実行－分類ツリー－ ............................................................... 100 4.3.2 結果の解釈－ツリー図－ ....................................................................................................... 109 4.3.3 結果の解釈－分類ルール－................................................................................................... 113 4.3.4 結果の解釈－ノードのゲイン－.......................................................................................... 114 4.3.5 結果の解釈－分類の精度－................................................................................................... 115