@Monty688 Of course the population size matters. Survey people who belong to group X, you may only take 10 if only 10 people belong to said group in the first place. It's 100% coverage.
Taking 1000 of 6 000 000 or 100 of 600 000 has the same ratio. Also, that was all that were answered of that age-group. It's likely that they did send more requests (say 1000), but only those 102 answered.
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@Monty688 Of course the population size matters. Survey people who belong to group X, you may only take 10 if only 10 people belong to said group in the first place. It's 100% coverage.
Taking 1000 of 6 000 000 or 100 of 600 000 has the same ratio. Also, that was all that were answered of that age-group. It's likely that they did send more requests (say 1000), but only those 102 answered.