Perhaps you should try some spelling variations:
statistical independence » statistical inference
statistical convergence » statistical inference
statistical inferences » statistical inference
statistical services » statistical survey
statistical evidence » statistical inference
statistical studies » statistical study, statistical survey, statistical theories

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 services) OR (statistical studies))) OR (((((statistical inferences) OR (((statistical independence) OR (statistical evidence))))) OR (statistical convergence)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((statistical services) OR (statistical studies))) or (((((statistical inferences) or (((statistical independence) or (statistical evidence))))) or (statistical convergence))))".
• Adding a wildcard symbol may retrieve word variants: ((((statistical services) OR (statistical studies))) or (((((statistical inferences) or (((statistical independence) or (statistical evidence))))) or (statistical convergence))))*.