famousringo on 15 May 2014
| kirby007 said: BTW 7900 users represent 34 MILLION thats extrapolation guys NPD is extrapolating |
A sample size of 7900 is huge. More than enough to draw useful conclusions on a population of 300 million Americans.
Assuming you don't bias the sample by, say, arbitrarily disregarding huge swaths of your sample.
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