Amedical researcher wishes to determine the % of females who take vitamins. he wishes to be 99% confident that the estimate is within 2% point of the true proportion. a recent study of 180 females showed that 25% took vitamins. how large should the smaple size be?

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answer:

i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket.   your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing).   good luck!   i hope you do well!