&gt; You&#x27;re depending on 1018 people who actually may not be statistically relevant, since America is a big, big country, to drive your thinking on that country.<p>It&#x27;s a problem if they&#x27;re badly sampled, but the sample size you need is doesn&#x27;t really change as you increase your population, as long as your population is a lot bigger than your sample size. If 1000 people would be OK for a population of 1M, then it should be just as good for a population of 100M.<p>I don&#x27;t think this really invalidates your point, it&#x27;s just a misconception I see a lot.<p><a href="http:&#x2F;&#x2F;www.surveysystem.com&#x2F;sscalc.htm" rel="nofollow">http:&#x2F;&#x2F;www.surveysystem.com&#x2F;sscalc.htm</a>