add exercise moments to toc

book/_toc.yml

@@ -31,6 +31,7 @@ parts:
       - file: sandbox/continuous/Parameterization.md
       - file: sandbox/continuous/fitting.md
       - file: sandbox/continuous/moments.md
+      - file: sandbox/continuous/moments_quiz.md
       - file: sandbox/continuous/GOF
     - file: sandbox/SanPart/ObservationTheory/01_Introduction.md
       title: Sensing and Observation Theory

book/sandbox/continuous/Uniform.md

@@ -50,4 +50,4 @@ $
 Var[X] = \frac{1}{12}(b-a)^2
 $
 
-Finally, note that uniform distribution is symmetric and presents 0 skewness. This is, it does not present any tail.
\ No newline at end of file
+Finally, note that uniform distribution is symmetric and presents 0 skewness. Thus, the median and the mean are identical. This is, it does not present any tail.
\ No newline at end of file