Perhaps you should try some spelling variations:
statistical differences » statistical inferences, statistical divergences, statistical differential
statistical difference » statistical inferences, statistical differential, statistics inference
inference » conference

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((statistical inference) OR (statistical differences))) OR (statistical difference)).
• Adding a wildcard symbol may retrieve word variants: ((((statistical inference) or (statistical differences))) or (statistical difference))*.