Demotruk on 02 September 2009
| Kantor said: A 12,000 sample size might be accurate for, say, 5 million products. For 100 million I'd rather go with manufacturer figures. This is marginally more accurate than the GamePro poll. The ratio of sample size:install base is roughly 1:8000. This is equivalent to an install base of 80,000, and asking TEN people. |
That's not how it works actually. Yes, as the population increases the size of the necessary sample increases, but it doesn't do so proportionally. As the population increases, the margin necessary for the sample to still be accurate diminishes.
For a population of say 4 million voters for example, the necessary sample size is a little less than 500. Increase the population to 200 million, and while the population has grown by 50 times, the sample size only needs to be about twice as big.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.
