In a recent poll of 1200 randomly selected adult office workers, 32% said they worn a halloween costume to the office at least once.

What is the margin of error, using 95% confidence level, for estimating the true population (percentage) of adult office workers who have worn a halloween costume to te office at least once?

What is 95% confidence interval for the proportion of all adult office workers who have worn a halloween costume to the office at least once?