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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there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?