A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 32 currents students...

A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 32 currents students discovering that 12 will return for summer school. b. with a 0.95 probability, how large of a sample would have to be taken to provide a margin of error of 3% or less?