The image below might give an intuitive view
This image also shows that high correlation does not always mean higher variance, or is at least ambiguous (that is, the image on the left has a high negative correlation and the result is a low variance for the sum $x+y$).
The image below might give an intuitive view
The image below might give an intuitive view
This image also shows that high correlation does not always mean higher variance, or is at least ambiguous (that is, the image on the left has a high negative correlation and the result is a low variance for the sum $x+y$).
The image below might give an intuitive view
