We have expected value, mean or average.
我们可以用期望值,或者是平均值。
What the standard deviation really tells you is that some set of users were + or - the test average (or arithmetic mean).
标准偏差真正能够告诉您的是,某些用户是高于还是低于平均测试水平(或者算术含义)。
The key thing to remember about random variables is that actual observations are centered around an average, or mean value.
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。
Another important concept in probability theory that we will use a lot is expected value, the mean, or average-- those are all roughly interchangeable concepts.
概率论中另外一个常用的重要的概念是,期望值或者也叫均值,这两个概念可以互换
I mean, the average, you know, the sort of typical workdays, 8 or 9 hours.
我是说,平均而言,正常的工作日,八九个小时。
People also call that the mean or the average.
也可以叫做平均值
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