it's me again, need some help, thanks

#1
:D

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???
OK
IT'S A POPULATION PROPORTION / SAMPLE SIZE.
2
N= P^Q^(Za/2 divided by E)
p^=.40
q^=.60
za/2=2.33
E=3.5

i got 1063, but the answers she listed to choose from are
A) 751
B) 1062
C) 1301
D) 532
this is perplexing :eek: and frightful.
let me know if I did this right or if 1062 is the answer
thanks!!!
hil