Originally Posted by
MickG0105
Don't fall for the old trap of thinking that 1500 can't possibly be a reasonably representative sample for a population of 25.5 million. Statistically, 1500 is more than sufficient to return results with a 3.5 per cent margin of error at a 99 per cent confidence level. If you're prepared to take your confidence level down to 95 per cent, with the same margin of error, you can get by with roughly half that number of participants.