Ok. I think I have it, but my answer does not quite match up. ???
A RECENT POLL OF 700 PPL. WHO WORK INDOORS FOUND THAT 278 OF THEM SMOKE. IF THE RESEARCHERS WANT TO BE 98% CONFIDENT OF THEIR RESULTS TO WTHIN 3.5%, HOW LARGE A SAMPLE IS NECESSARY???
IT'S A POPULATION PROPORTION / SAMPLE SIZE.
N= P^Q^(Za/2 divided by E)
i got 1063, but the answers she listed to choose from are
this is perplexing and frightful.
let me know if I did this right or if 1062 is the answer