[citation][nom]ct1615[/nom]I assume you are not college educated and just slept through all of stats class. Although 552 gamers is a low number to get an accurate measure, you need no where near 10k people.[/citation]
You realize that a sample size of 10,000 people would only represent 0.003% of the population size, right? Heck, you would need way more than 30,000 if you wanted to actually have some concrete figures for any productive discussion around the topic.
As you mentioned, in terms of practicality, 552 isn't a bad number to perform a survey with when applied to the context of a small region but the study made conclusions and spread it over to an entire nation of over 300,000,000 people.
Let alone the obvious fact that one city alone does not constitute a good representation of an entire nation (especially one of the size of the US), 552 out of 300,000,000 is only 0.000184%. That's a horribly minuscule sample size to conduct for a study focusing on demographic. As an earlier member mentioned, the data supplied would be suitable for studies on depressed individuals, not "average Americans".