diff --git a/squares.py b/squares.py
index 893e1db..03b9a64 100644
--- a/squares.py
+++ b/squares.py
@@ -2,7 +2,7 @@
 
 
 def average_of_squares(list_of_numbers, list_of_weights=None):
-    """ Return the weighted average of a list of values.
+    """ Return the weighted average of squares of a list of values.
     
     By default, all values are equally weighted, but this can be changed
     by the list_of_weights argument.
@@ -29,7 +29,7 @@ def average_of_squares(list_of_numbers, list_of_weights=None):
         for number, weight
         in zip(list_of_numbers, effective_weights)
     ]
-    return sum(squares)
+    return sum(squares)/len(squares)
 
 
 def convert_numbers(list_of_strings):
@@ -38,7 +38,7 @@ def convert_numbers(list_of_strings):
     Example:
     --------
     >>> convert_numbers(["4", " 8 ", "15 16", " 23    42 "])
-    [4, 8, 15, 16]
+    [4.0, 8.0, 15.0, 16.0, 23.0, 42.0]
 
     """
     all_numbers = []