Statistics: Standard deviation | Descriptive statistics

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Let's review a little bit of everything we learned so far.

And hopefully make everything fit together a little bit better.

And then we'll do a bunch of calculations with real numbers.

And I think it'll really hit the point home.

So first of all, let me make some columns.

So if we're dealing with-- let's see.

We could call it the concept.

And then we'll call it the-- whether we're dealing with a population or a sample.

So the first statistical concept we came up with was the notion of the mean or the central tendency.

And we learned that that was one way to measure the average or central tendency of a data set.

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