中央極限定理

中央極限定理

(1)
\begin{eqnarray} x_1+x_2+...+x_n \rightarrow N(\mu, \delta/\sqrt{n}) \end{eqnarray}

常態分布的重要數值

(2)
\begin{eqnarray} 1. && P[-\delta < X - \mu < \delta] &=& 0.68 \\ 2. &&P[-2 \delta < X - \mu < 2 \delta] &=& 0.95 \\ 3. && P[-3 \delta < X - \mu < 3 \delta] &=& 0.997 \end{eqnarray}
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