Question, I thought I understood ratings but now I'm confused.For these two.. as I understand it, for New Girl- 3.5 = 3.5% of all TV sets are watching New Girl, and 9% of all people currently watching TV are tuned into New Girl.But if that's the case, and it has the same "rating" as NCIS, why is the viewership so different? Or, that rating is only 18-49, so does NCIS have a much bigger total rating? Or is it because NCIS is an hour long? 9:00 FOX The New Girl 3.5/9 6.80 CBS NCIS: Los Angeles 3.4/8 15.59