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Normal distribution var(x)=sigma^2

  1. Nov 12, 2009 #1
    suppose that X is normally distributed with mean u and standard deviation sigma. show that var(x)=sigma^2.[you many use the fact that if Z is standard normally distributed, then EZ=0 and var(x)=1]
     
  2. jcsd
  3. Nov 13, 2009 #2

    HallsofIvy

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    Okay, what is the definition of "variance"? What is the definition of "standard deviation"? The result should be immediate from the definitions.
     
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