[問題] 成大工管統計考古題

看板Statistics作者 (VC)時間17年前 (2008/12/16 23:30), 編輯推噓1(100)
留言1則, 1人參與, 最新討論串1/1
Consider the expression Cov(aX,bY+c) for random variables X and Y , where a,b and c are constants. (a)Show that Cov(aX,bY+c) = abCov(X,Y) (b)Give the geometric interpretation for the equality given in (a). 請問這兩題要怎麼寫才算比較詳盡呢? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.171.94.70

12/17 18:00, , 1F
(a)帶共變數定義:Cov(X,Y)=E[(X-E(X))*(Y-E(Y))]
12/17 18:00, 1F
文章代碼(AID): #19HycTg3 (Statistics)