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akhil mahajan
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Posted on : 04:49:43 PM on May 01, 2010

If the coefficient of correlation between x and y is 0.28 , covariance between x and y is 7.6 and variance of x is 3 then what is the S.D. in y series?? what is COEFFICIENT OF CORRELATION , btw??

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Ranjan Nagpal
  Ranjan
Posted on : 10:33:23 AM on May 08, 2010

The coefficient of correlation indicates an association between two variables.

The formula is:

r_{xy} = \frac{COV(X,Y)}{ SD_{x}SD_{y}}

Variance=SD^2

SD_{x}= \sqrt {3}

Now you have everything to put into the formula

Hence, SD_{y}=15.7



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