It is easy to compute $E(s^2)=E(\frac{1}{n-1}\sum_{i=1}^{n}(x_i-\bar{x})^2)=\sigma^2$. My question is - how can E(s) be calculated?
I'm trying to use $\frac{s^2(n-1)}{\sigma^2}$ has Chi-square distribution, but it does not help a lot.
2026-03-30 04:00:12.1774843212
Find expected value of root of a sample variance
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