A poll reported a 36% approval rating for a politician with a margin of error of 1 percentage point. 1) How many voters should be sampled for a 90% confidence interval? Round up to the nearest whole number. Check Show answer 2) How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number. Check Show answer 3) How many voters should be sampled for a 95% confidence interval if no previous estimate is given? Round up to the nearest whole number. Check Show answer Feedback