Expected Value
가정: X 와 Y 가 서로
독립적 (independent)
일때
Retrieved from http://wiki.commres.org//ExpectedValue
last modified 2012-05-08 14:46:14
![$ E[X] = (\sum_(i=1)^n (X_i)) $](/_cache/latex/8/89/3c76a415f32fd04b425278edcfd966fc.png "$ E[X] = (\sum_(i=1)^n (X_i)) $")
![$ E[X+Y] = E[X] + E[Y] $](/_cache/latex/5/5c/791a30295b4b447643c6fc7ad1b3a1fc.png "$ E[X+Y] = E[X] + E[Y] $")
![$ E[cX] = cE[X] $](/_cache/latex/3/37/65cc4bad15b47ef0817bea94b9fe1e21.png "$ E[cX] = cE[X] $")
![$ E[X*Y] =E[X] E[Y] $](/_cache/latex/7/78/ec559c541b8eb07ad0a4d5d80d554f46.png "$ E[X*Y] =E[X] E[Y] $")