Answer:
Cross Sectional Data.
Explanation:
Cross-sectional data:- These are the observations that are made at the same point in the defined time period. These observations could be on a single day or these observations can also be for a week, month, year.
So the case provided to us is the data for a season of NFL that was from 2011-2012 season.So we can say that the data is cross-sectional.