Thomas Shey
Legend
Based on the numbers involved, they have a more than representative sample, yes.
Numbers, per se, don't actually tell you that, if the selection method already biases things. This comes up regularly in the way some surveys are using out of date methodologies (phone surveys still often use land line numbers, which is going to end up aiming at A) People who still have land lines, and B) Pick them up rather than let an answering machine get them. That's going to fish in only a limited pond, but it can still produce relatively large numbers if the poll taking is extensive).