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)。
What the standard deviation really tells you is that some set of users were + or - the test average (or arithmetic mean).
根据一个模型自动生成测试可以纠正某些偏差。
Generating tests automatically from a model can overcome some biases.
因为该负荷是静态的，所以比较是有效的，而且性能测试应用中标准偏差的典型使用也是有效的。
Since this overhead is static, comparisons are valid and the typical USES of standard deviation in performance testing apply.
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