Ranks.

So I can't do very fancy things with it.

And that's true of Z distributions, the mean is zero. We can take that Z score and then convert it into a percentile rank.

Normal controls show that was the magic I showed you now I'm showing it to you in graphical form

Technician was the lowest rank on this ship. The man who changed the bog rolls was higher than us.

So we're definitely talking highend.

And why is that?

3 months ago, on the final day of my training,

Agraders Masters Cgraders Slaves

You know, that there was a rank and some people will be at the top and some people would be at the bottom.

I'm just kind of making this up on the fly.

Such a situation is easily addressed by what's called principal component analysis, or PCA.

Still feeling cocky, Mr. Milwaukee?

Yes, this grading system is like a caste system

and then rated women based on their hotness.

So now your risk is really a Double A risk and not a Double

Yeah, you know, not like street level. Higher.

We've No, first of all, New York Magazine always gets it.

One desperate grief cures with another's languish Take thou some new infection to thy eye,

Now, it doesn't have to be that way. It really doesn't.

So we're going to give these what they call, let's say they say AAA rating.

This song is No. 1 on the hit chart.

He said, You're in the championship again.

This is the result that has been replicated over and over again.

Remember Chris Brown's video Forever ?

Moody's is one of the ratings agencies, and they rate

Any weight you want just as long as they are not negative or zero.

This is like high school chemistry class, right?

You know certainly when I was growing up what we thought was the way to get on was to compete.

So instead of giving 10 , they cut out 1 to insure it.

There's one little bit left we haven't used those ranks, so one of the questions on your homework will be using the ranks to get the best result.

Let's say that they're B I don't know, all these ratings have different terminology.

This market has hurt even the best of companies.

And another case, we have a smaller version of the same problem.

Kind of interesting maybe but a slightly counter intuitive problem.

But as I said multiple times, I can't do it, because they are BB rated.

Or you know, whatever they told them.

You can imagine these apples are web pages, and you can imagine an orange would be an image.

And this pension fund had the same problem.

I made it to the final, and I won the World Cup in a higher category than my own.

Hey, these guys are good for their money, they're Double A or whatever.

And so I'm fine.

And so the ratings agencies, Standard and Poor's and

Well, unfortunately there's no international ranking tables for teacher feedback systems.

the higher your rank.