Confidence Intervals for Population Proportions You wish to estimate, with a 99% confidence interval, the population proportion of U.S adults who support labeling legislation for genetically modified organisms (GMOs). Your estimate must be accurate within 2% of the population proportion.

1. No preliminary estimate is available. Find the minimum sample size needed

2. Find the minimum sample size needed, using a prior study that found that 75% of U.S. adults support labeling legislation for GMOs.