It is also able to perform simple arithmetic operations between any number of data points.

它还可以在任意数量的数据点之间执行简单的算术运算。

And then you divide by the number of data points you added.

然后除以添加的数据点数。

Remember, n is the number of data points you had in each group.

请记住，n 是您在每组中拥有的数据点数。

You get 21 divided by the total number of data points.

你得到 21 除以数据点总数。

And then you divide it by the number of data points you have.

然后你将它除以你拥有的数据点数。

The sample mean, you just add up the numbers in your sample and divide by the number of data points you have.

样本均值，您只需将样本中的数字相加， 然后除以您拥有的数据点数。

And it's going to be all of that-- and I know it looks a little bit funny-- divided by the number of data points we have, divided by 5.

这将是所有这些——我知道这看起来有点滑稽——除以我们拥有的数据点数，再除以 5。