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Teabags
28-10-2012, 11:31 PM
Just a quick question.
E - sum of.

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

Prove Ex^2=8876

Thanks!
Teabags
28-10-2012, 11:52 PM
Got it sorted now ;l wasn't thinking.
Andii
04-11-2012, 04:14 PM
Is x like 25 ??
Teabags
07-11-2012, 11:05 PM
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!

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