And based on what we know, are smartwatches and other similar devices accurate calorie estimators?

根据我们所知道的，智能手表和其他类似的设备是准确的卡路里估算器吗?

So we can get the best estimator of the true variance.

所以我们可以获得真实方差的最佳估计量。

And if you want an unbiased estimator, you divide by n minus 1.

如果你想要一个无偏估计量，你可以除以 n 减 1。

Remember, this is a sample variance, and we want to get the best estimator of the real variance of this distribution.

请记住，这是一个样本方差，我们希望获得该分布真实方差的最佳估计值。

It actually turns out that this is not an unbiased estimator for this.

事实上，这并不是一个无偏估计量。

We are just trying to find our best estimator for it.

我们只是想为它找到最好的估计量。

It became a little bit more loosey-goosey once I went from the exact standard deviation of the sampling distribution to an estimator for it.

一旦我从抽样分布的精确标准差转向它的估计量，它就变得有点松散了。

So we could re-write this, so we could say that we are confident because we are really using an estimator to get this value here.

所以我们可以重写这个，所以我们可以说我们有信心， 因为我们真的在使用估算器来获得这个值。

The results of the three estimators all showed that peer rejection played a mediating role between the paternal authoritarian parenting style with respect to ADHD symptoms.

三个估计量的结果均表明， 同伴排斥在父亲专制教养方式与 ADHD 症状之间起中介作用。

And then one day he stumbled across this blog post from Shipt's engineering team about this new tool they were developing called a " Shopping time estimator." LULU: Okay.

BECCA：有一天，他偶然发现了 Shipt 工程团队的一篇博客文章，介绍了他们正在开发的一种新工具，称为“购物时间估算器”。露露：好的。