http://i41.tinypic.com/opv2nm.png

I dont understand how it comes to this?

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- Dec 23rd 2011, 07:06 AMHelpmeplease1covariance
http://i41.tinypic.com/opv2nm.png

I dont understand how it comes to this? - Dec 23rd 2011, 09:48 AMILikeSerenaRe: covariance
Hi Helpmeplease1! :)

Do you have the formulas for covariance and correlation?

Those need to be applied.

For reference:

Covariance - Wikipedia, the free encyclopedia

Correlation and dependence - Wikipedia, the free encyclopedia

However, you still should define $\displaystyle w_a$ and $\displaystyle w_b$.

What are they?