diff -r 7e179ee91af0 Lib/statistics.py
--- a/Lib/statistics.py	Mon Mar 23 15:26:49 2015 +0200
+++ b/Lib/statistics.py	Tue Apr 28 10:55:56 2015 +0200
@@ -178,6 +178,8 @@
         total += Fraction(n, d)
     if issubclass(T, int):
         assert total.denominator == 1
+        if T is bool:
+            return int(total.numerator)
         return T(total.numerator)
     if issubclass(T, Decimal):
         return T(total.numerator)/total.denominator