If we collect data on the number of wins each team in the nfl had during the 2011-12 season, we have data.

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.

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