Question
Asked Aug 31, 2019

How to prove that n peices of information in Sumation of i=1 to n (xi-xbar) = zero. also known as not independant. I know that xbar= (sumation i=1 to n x)/ n. 

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Expert Answer

Step 1

We want to prove 

n
i=1
Given that
Σ1Χ
n
n
2T-1 xn.eq 1
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n i=1 Given that Σ1Χ n n 2T-1 xn.eq 1

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Step 2
Proof
ni... eq 2
.n times
i-1
n
Еxpanding
(Xx)
i-1
71X i = nï - ni = 0 (using eq 1 and eq 2)
_
i=1
i=1
help_outline

Image Transcriptionclose

Proof ni... eq 2 .n times i-1 n Еxpanding (Xx) i-1 71X i = nï - ni = 0 (using eq 1 and eq 2) _ i=1 i=1

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