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1. 簡單迴歸分析
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1. 簡單迴歸分析. 迴歸分析與相關分析的意義. 變數間的線性關係. 變數間的非線性關係. 正向線性關係. 負向線性關係. 無關係. 範例:廣告支出與銷售額的資料 單位:萬元. 廣告支出與銷售額的散佈圖. 廣告支出與銷售額的關係. 三個廣告支出與銷售額的直線關係. 建立迴歸模型. 簡單迴歸模型的假設條件. 簡單迴歸模型. 樣本觀察值散佈圖. 估計迴歸模型. 估計迴歸模型. 估計迴歸模型. 估計的迴歸方程式. 最小平方法的計算. 廣告支出與營業收入的迴歸結果. 汽車銷售額的迴歸估計式. 估計迴歸模型. Gauss-Markov 定理.
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1. 簡單迴歸分析
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Presentation Transcript
判定係數的計算 • R2=0.9334
評判迴歸模型-統計上的檢定 對個別迴歸係數做統計推論-對β的檢定
簡單迴歸分析─評判迴歸模型 對個別迴歸係數做統計推論-對α的檢定
簡單迴歸分析-評判迴歸模型 對個別迴歸係數做統計推論-β的區間估計
評判迴歸模型 • 對β的檢定: • Conclusion: reject H0 • β的信賴區間:
1-1 相關分析
1-1 相關分析
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