[PS] Rework parts of tests section, more changes to come

semester4/ps/ps-jh/parts/03_expected-value/00_intro.tex

@@ -10,4 +10,4 @@
 \shortremark $|\cX| = \cX_+ + \cX_-$; $\cX = \cX_+ - \cX_-$. Für $\cX \geq 0$ ist $\E[\cX]$ immer definiert.
 Falls $\cX$ kein konst. Vorzeichen, $\E[\cX]$ undef.
 
-\shortremark $\E[\cX] = \int_{0}^{\8} (1 - F_\cX(x)) \dx x - \int_{-\8}^{0} F_\cX(x)$
+\shortremark $\E[\cX] = \int_{0}^{\8} (1 - F_\cX(x)) \dx x - \int_{-\8}^{0} F_\cX(x) \dx x$