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Results tagged with unbiased-estimator
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user 4426
Refers to an estimator of a population parameter that "hits the true value" on average. That is, a function of the observed data $\hat{\theta}$ is an unbiased estimator of a parameter $\theta$ if $E(\hat{\theta}) = \theta$. The simplest example of an unbiased estimator is the sample mean as an estimator of the population mean.
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How exactly did statisticians agree to using (n-1) as the unbiased estimator for population ...
The formula for computing variance has $(n-1)$ in the denominator:
$s^2 = \frac{\sum_{i=1}^N (x_i - \bar{x})^2}{n-1}$
I've always wondered why. However, reading and watching a few good videos about …
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