Hi Allstat,
This may sound like a very simple question or it may not.
If I have a population of 2.3 million people and I want to draw some
conclusions about them, what size sample do I need to take? I know nothing
about the population I am sampling from, so I don't know what's
representative, is there some rule of thumb about sample sizes? I am likely
to be looking at a number of different things in the population of which I
know nothing, so I can't just assume that 50% do something and calculate
sample sizes that way can I?
Regards
Louise
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