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  1. 28-10-2012, 11:31 PM #1
    Teabags
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    Default >maths help! +rep.

    Just a quick question.
    E - sum of.

    E(x-10) = 208
    E(x-10)^2=2716

    Prove Ex^2=8876

    Thanks!

    superhappy.

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  2. 28-10-2012, 11:52 PM #2
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    Got it sorted now ;l wasn't thinking.

    superhappy.

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  3. 04-11-2012, 04:14 PM #3
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    Is x like 25 ??
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    +1
  4. 07-11-2012, 11:05 PM #4
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    Quote Originally Posted by Andii View Post
    Is x like 25 ??
    I hadn't explained it properly. Needed to know that 20=n >so you can workout Variance + sd.

    Really was having a blank moment.
    The answer wasn't 25 I don't think, but that's for giving it a go anyway!

    superhappy.

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