一下4-2二維數據分析(3個變數間相關係數問題)

資料來源：

1.http://tblog.pcsh.ntpc.edu.tw/lifetype/gallery/104/90.pdf

2.http://zh.wikipedia.org/zh-tw/%E7%AC%A6%E5%8F%B7%E5%87%BD%E6%95%B0

3.http://www.google.com.tw/url?sa=t&rct=j&q=%E4%BB%A4X%E4%BB%A3%E8%A1%A8%E6%AF%8F%E5%80%8B%E9%AB%98%E4%B8%AD%E7%94%9F%E5%B9%B3%E5%9D%87%2B%E8%A7%A3%E6%9E%90&source=web&cd=5&ved=0CD8QFjAE&url=http%3A%2F%2Fw3.tshs.tp.edu.tw%2F~h-maths%2Fimportant-exam%2Fimportant-exam1%2F1-90math-answer.doc&ei=N2_AUbujLoGGkAWc-IG4Dw&usg=AFQjCNGPU9Rosu9EW1SZmB1qgGQxesQj2Q

4.http://www.google.com.tw/url?sa=t&rct=j&q=%E4%BB%A4X%E4%BB%A3%E8%A1%A8%E6%AF%8F%E5%80%8B%E9%AB%98%E4%B8%AD%E7%94%9F%E5%B9%B3%E5%9D%87%2B%E8%A7%A3%E6%9E%90&source=web&cd=9&ved=0CFEQFjAI&url=http%3A%2F%2F140.128.164.3%2Fblog%2Fgallery%2F192%2F99%25E7%2599%25BE%25E5%2588%2586%25E7%2599%25BE%25E6%2595%2599%25E5%25B8%25AB%25E7%2589%2588(4-2%25E4%25BA%258C%25E7%25B6%25AD%25E6%2595%25B8%25E6%2593%259A%25E5%2588%2586%25E6%259E%2590).doc&ei=N2_AUbujLoGGkAWc-IG4Dw&usg=AFQjCNE6bKabbwFl-znPZJxFvFxGZepfNg