摘要：
Let $X_1$, $\ldots$, $X_n$ be independent and identically distributed as $N(\mu, \sigma^2)$, i.e. this is a sample of size $n$ from a normally distrib 阅读全文
摘要：
The sample mean is given by \begin{align} \overline{x}=\frac{1}{n}\sum_{i=1}^n x_i. \end{align} The biased sample variance is then written: \begin{ali 阅读全文