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)。

youdao

Comparing the ratio of standard deviation to the average for these two distributions shows that they are similar.

把这一标准差和两次的平均值相比较，我们就能发现他们很相像，（因为我们知道重力加速度是个常数）。

youdao

Using the average and the standard deviation, you can interpret that 68% of the attempts were between .2 and 1.3 seconds.

使用平均值和标准偏差，您可以说明，68% 的尝试是在 0.2 秒到 1.3 秒之间。

youdao

If you rank the countries of the world in terms of the academic performance of their schoolchildren, the U.S. is just below average, half a standard deviation below a clump of relatively high-performing countries like Canada and Belgium.

NEWYORKER: Most Likely to Succeed

Once you know the average return, the standard deviation of each index and the correlation coefficient between each pair of indexes, the rest is math.

FORBES: Asset Allocation and the Efficient Frontier

The gray area around the average line shows the two standard deviation range of the data.

FORBES: U.S. Navy Scrambles for Piece of Arctic Pie