List quiz as available for 8.4

Author: jmshea

08-random-variables/intro.ipynb

@@ -31,7 +31,7 @@
     "* {doc}`Section 8.1: Definition of a Real Random Variable<1-definition>` (interactive quiz and flashcards)\n",
     "* {doc}`Section 8.2: Discrete Random Variables<2-discrete-rvs>` (interactive quiz and flashcards)\n",
     "* {doc}`Section 8.3: Cumulative Distribution Functions<3-cdfs>` (interactive quiz and flashcards)\n",
-    "* {doc}`Section 8.4: Important Discrete Random Variables<4-important-discrete-rvs>` (interactive flashcards)\n",
+    "* {doc}`Section 8.4: Important Discrete Random Variables<4-important-discrete-rvs>` (interactive quiz and flashcards)\n",
     "* {doc}`Section 8.5: Continuous Random Variables<5-continuous-rvs>` (interactive flashcards)\n",
     "* {doc}`Section 8.6: Important Continuous Random Variables<6-important-continuous-rvs>` (interactive flashcards)\n",
     "* {doc}`Section 8.8: Conditioning with Random Variables<8-conditioning-with-rvs>` (interactive flashcards)\n",