The mean of a population.

What's the mean of a population?

Maybe your sample mean is here and your population mean is here.

We don't know what the population mean is without looking at the whole population.

I mean, 90 percent of the population will watch Nollywood.

The mean of a population once again, that's mu the mean of a population is equal to, you take the sum of each of the data points.

Because they're always going to be closer to their own mean than they are to the population mean.

Well the mean here and let's say this is the population.

And it's probably a good estimate of the mean of the population.

Here we used the population mean, but now we'll just use the sample mean because that's all we can have.

The population of the mean is probably going to be I don't know.

But it's completely possible that the population mean is outside of your data sample.

Same way that you could never get the mean of a population, but maybe you want to estimate it by getting the mean of a sample.

The way I took the mean of a population, I said, well, if I just have a sample, let me just take the mean the same way.

So let's say X sub i, and then X sub i minus the mean, for this population.

The whole point of what I'm saying is, when you take a sample, there's some chance that your sample mean is pretty close to the population mean, right?

You're mean, mean, mean, mean, you're so mean!

It might have just been you just happen to pick ones that don't contain the actual population mean.

Population in some rural areas have no access to potable water, and its supply is provided by mean of water tankers.

Iran applies a mean population figure of 35,000 larvae per hectare in estimating the total quantity of fish lost by IFC.

But in this case, your sample is kind of skewed and the actual mean of the population is out here someplace.

I realize I made a slight error in the last video, when I talk about the population and the sample mean.

Well, if we want to estimate the mean of a population by somehow calculating a mean for a sample, the best thing I can think of And really these are kind of engineered formulas.

Sample mean is equal to Once again, you take each of the data points now in the sample, not in the whole population.

Second, just because the territory contains high ground does not mean that it will be capable of sustaining its population, should it lose what is at present a coastal area in which the population lives.

You're beautiful. I mean... I mean...

No, I mean... I mean here...

You mean... you mean the town?

You don't mean... You can't mean...

Don't be mean. I'm not mean.

I don't mean that, I mean...

They mean what you think they mean.

Mean

Mean

Mean

mean

Mean.

What do you mean, what do I mean?

These don't mean what you think they mean.

Do you know what I mean? I mean...

I don't mean this. I mean out there.

But instead of taking the sum of the points, you take each point, X sub i, and you subtract from that and actually it doesn't matter if you subtract from that or subtract that from the mean, the population mean.

When a distribution is skewed and not symmetrical around a middle value, the mean can fail to describe properly the population and its change over time.

That number has grown over the years, as Soviet officials broadened the definition of wartime deaths to mean total population loss, rather than direct military casualties.

You're personality is mean, but today it's especially mean.