For one thing, they're reliable and sofar as they're based on unbiased samples.

首先，如若基于无偏样本，那么这些刻板印象就很可靠。

For one thing, they're reliable insofar as they're based on unbiased samples.

首先，如若基于无偏样本，那么这些刻板印象就很可靠。

The variance of a sample, or sample variance, or unbiased sample variance-- and that's why we're going to divide by n minus 1.

样本的方差，或样本方差，或无偏样本方差——这就是我们要除以 n 减 1 的原因。

And there's a formula-- and this is actually proven more rigorously than I'll do it-- that is considered to be a better-- or, they'll call it, unbiased-- estimate of the population variance, or the unbiased sample variance.

有一个公式——这实际上被证明比我做的更严格——被认为是更好的——或者，他们称之为无偏——人口方差估计， 或无偏样本方差。