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Topic: 2nd (raw?) moment of uniform PDF
Replies: 2   Last Post: Feb 15, 2013 6:26 PM

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Paul

Posts: 263
Registered: 2/23/10
Re: 2nd (raw?) moment of uniform PDF
Posted: Feb 15, 2013 6:26 PM
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On Feb 14, 8:38 pm, quasi <qu...@null.set> wrote:
>Paul wrote:
>>The papers states that the second moment of X~U(a,b) is:
>>
>> E(X^2) = ( b^3 - a^3 ) / 3(b-a)
>>
>>My own integration of x^2 from a to b yields (b^3-a^3)/3.

>
> >Can anyone point out where Hauptmanns's extra normalization
> >factor 1/(b-a) comes from?

>
> The probability mass function is 1/(b-a).


Doh! I don?t do this sort of thing nearly enough, and I?m trying to
consume more advanced material.

Thanks!



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