Statistics: Sample variance | Descriptive statistics

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This video, here, is a groundbreaking video, for multiple reasons.

One, I'm going to introduce you to the variance of a sample, which is interesting in its own right.

And I'm attempting to record this video in HD, and hopefully you can see it bigger and clearer than ever before.

But we'll see how all of that goes.

So this is a bit of an experiment, so bear with me.

But so, just before we go into the variance of a sample, I think it's instructive to review the variance the population, and we can compare their formulas.

The variance of a population-- and it's this Greek letter, sigma.

Lowercase sigma squared.

That means variance.

I know it's weird that a variable already has a squared in it.

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