Posted by Amelia on .
What is the difference between "weighted mean" and "arithmetic mean?"

Math Statistics 
PsyDAG,
I searched Google under the key words "weighted mean and arithmetic mean" to get these possible sources:
(Broken Link Removed)
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.