What is covariance and why is it important?

[Greenman72]

^The covariance changes because the variance changes. The Std Dev changes because the variance changes. The variance changes because the average changes. The average changes because the sum changes. The sum changes because the unit of measurement changes.

And the green grass grew all around.

[S2000magician]

@Greenman72

^The covariance changes because the variance changes. The Std Dev changes because the variance changes. The variance changes because the average changes. The average changes because the sum changes. The sum changes because the unit of measurement changes.

And the green grass grew all around.

LOL!

A bump on a log in the middle of the sea . . . .