对于随机的变化关键要记住的是，实际的观测资料都在平均数或者中间值周围。

The key thing to remember about random variables is that actual observations are centered around an average, or mean value.

youdao

我引用的只是数学计算的一个平均值，而波斯纳的数据却是家庭收入分配的中位数或者说中间点。

The data I cite are arithmetical averages, while, as Posner indicates, his data on household incomes are medians, or midpoints, of the distribution of household incomes.

youdao

计算这两个日期之间的差(以分钟为单位)，然后使用您所输入的单词数(由中间的命令输出)除以这个值，以得到平均每分钟输入的单词数。

Take the difference in minutes between the two dates and divide by the number of words you typed (which is output by the middle command) to get the average number of words per minute you type.

youdao

But we might then wonder, for every person who gets less than the average amount of life-- suppose we take the median, take the amount of life that's exactly, 50 percent of the people get more, 50 percent of the people get less.

但是接着我们可能会想，对于所有活得比平均寿命要短的人-,假设我们取中间数，相对于平均寿命，刚好五成的人活得更长，五成的人活得更短。

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