Adjusted sample variance
Given a sample
![[eq1]](http://images1.statlect.com/adjusted_sample_variance__1.png)
of
observations, their adjusted sample variance
is:![[eq2]](http://images1.statlect.com/adjusted_sample_variance__3.png)
where
is their sample
mean:![[eq3]](http://images1.statlect.com/adjusted_sample_variance__5.png)
Under appropriate conditions, the adjusted sample variance is an unbiased estimator of the population variance.
More details about the adjusted sample variance can be found in the lecture entitled Variance estimation.
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