Correlation coefficient between X and Y, linear regression.

deiluefniwf 2022-09-24 Answered
The formula that I know for correlation coefficient
( x i x ¯ ) ( Y i Y ¯ ) ( x i x ¯ ) 2 ( Y i Y ¯ ) 2
If the only given values I have are x i , x i 2 , y i , x i y i is it even possible to compute the correlation coefficient?
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Answers (1)

Nathalie Rivers
Answered 2022-09-25 Author has 7 answers
Step 1
Apparently you are referring Pearson's sample correlation coefficient. In that case, one of the known alternative formulas is
r x y = x i y i x i y i n x i 2 ( x i ) 2 n y i 2 ( y i ) 2
So I believe that you would still need to have at least ∑y2i and n to compute it.
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New questions

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historical past/issues:
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