Let's reword this text somehow to expalin it better ...
Current Text - Following is a summary of all of the ratings for this game. Of the ratings, 4 were left by members of the site; the remaining were left anonymously. Note that when calculating the overall game rating, additional factors are considered, such as a higher weight on member ratings and an exclusion of ratings outside the standard deviation.
Of the 8 ratings, only 5 were considered in determining the overal rating of 5. This could be for various reason, such as duplicate ratings and outside of a standard deviation.
