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Properties of variance

  1. Dec 13, 2007 #1
    [SOLVED] Properties of variance

    Would the Var(aX + bY + c) just be the Var(aX+bY) since adding a single number to the function doesn't change the variance. I would then be able to use the property:

    Var(aX+bY)= a^2Var(X)+b^2Var(Y)+2abCov(X,Y)

    Just wondering if anyone can confirm my reasoning here. Thanks.
  2. jcsd
  3. Dec 13, 2007 #2


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  4. Dec 13, 2007 #3
    Thank you, that's all I need. Mods can close.
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