[methods] normal distributions on CAS

diff --git a/methods/statistics.tex b/methods/statistics.tex
index 1ad360ef561d47af2697382a0582d23f59f877fa..3a205e575c41e43881b0fe4e00e51d62c26437a0 100644 (file)
--- a/methods/statistics.tex
+++ b/methods/statistics.tex
@@ -197,4 +197,12 @@
 
   \[ Pr(a \le X \le b) = \int^b_a f(x) \> dx \]
 
 
   \[ Pr(a \le X \le b) = \int^b_a f(x) \> dx \]
 

+  \colorbox{cas}{On CAS:} Interactive \(\rightarrow\) Distribution \(\rightarrow\) \verb;normCdf;.
+
+  For function in domain \(a \le x \le b\):
+
+  \[ \operatorname{E}(X) = \int^b_a x f(x) \> dx \]
+
+  \[ \operatorname{sd}(X) = \sqrt{\operatorname{Var}(X)} = \sqrt{\oepratorname{E}(X^2)-[\operatorname{E}(X)]^2} \]
+

 \end{document}
 \end{document}