Okay that was the "stat" answer (which brings in too many irrelevant details). The "business" answer is think in terms of something like http://en.wikipedia.or

Okay that was the "stat" answer (which brings in too many irrelevant details). The "business" answer is think in terms of something like http://en.wikipedia.org/wiki/Net_Promoter http://en.wikipedia.org/wiki/Net_Promoter and say "the middle scores are just noise- so the only meaningful summary you can pull out is the net difference in 4 and 5 star reviews against 1 and 2 star reviews."