Which expression should you simplify to find the 90% confidence interval for a sample of 64 people with a mean of 36 and standard deviation of 4?

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is