sec-8: change mean and variance with μ1 and μ2

slides/sections/8.md

@@ -86,6 +86,7 @@ $$
   \draw [fill=white] (-5.5,-0.1) rectangle (-1.85,1.1);
   \node [above right, align=left] at (-5.5,-0.1) {$m\ex = 1.356...$\\$m\ob = 1.402 \pm 0.020$};
   \draw [cyclamen, ->, very thick] (-3.5,1.1) to [out=90, in=-135] (-1.2, 2);
+  \pause
   % Right note
   \draw [fill=white] (2,2.5) rectangle (5.2,3.7);
   \node [above right, align=left] at (2,2.5) {$w\ex = 4.02...$\\$w\ob = 5.08 \pm 0.28$};
@@ -144,7 +145,7 @@ $$
 \begin{tabular}{rccccc}
   \toprule
                          & & \multicolumn{2}{c}{L sample} & \multicolumn{2}{c}{M sample}    \\
-                         &          & mean        & variance    & mean        & variance    \\
+                         &          & $\mu_1$     & $\mu_2$     & $\mu_1$     & $\mu_2$     \\
   \midrule
   \multirow{2}{*}{50000} & $\Theta$ & 0.255       & 0.432       & 161.1       & 162.5       \\
                          & $p$      & \gre{0.614} & \gre{0.511} & \gre{0.000} & \gre{0.000} \\