A poll reported a 36% approval rating for a politician with a margin oterror of 1 percentage point. '0 How many voters should be sampled for a 90% confidence interval? Round up to the nearest Whole number. A 2) How many voters should be sampled for a 95% confidence interval? Round up to the nearest Whole number. 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.