For your political science class you'd like to take a survey from a sample of all the catholic church members I your city. a list of church shows 17 catholic members within the city limits. rather than try to obtain a list of all members of all these churches you decide to pick 3 at random. fro those churches you'll ask to get a list of all current members and contact 100 members at random.
a) what kind of design have you used?
b) what could go wrong with your design?
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