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And to ensure a fair, unbiased test, they gave us a frozen pizza.
为了确保测试公平、公正,他们给了我们一个冷冻披萨。
I think we've proven there, in that unbiased test, that it was his right foot that came forward.
我想刚才的无差测试已经证明它先迈的是右爪。
在统计学中,偏差可以用于两个不同的概念,即有偏采样与有偏估计。一个有偏采样是对总样本集非平等采样,而一个有偏估计则是指高估或低估要估计的量。
偏差不一定有害。尽管一个有偏采样会难以分析或引起不准确甚至错误的推断,但是有偏估计在某些情况下也有一些好的特性,例如较小的方差。
A statistic is biased if it is calculated in such a way that it is only systematically different from the population parameter of interest. The following lists some types of biases, which can overlap.
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