Polling results: A simple random sample of 400 voters in the town of East Overshoe was polled, and 242 said they planned to vote in favor of a bond issue to raise money for elementary schools. A simple random sample of 300 voters in West Overshoe was polled, and 161 said they were in favor. Construct a 98% confidence interval for the difference between the proportions of voters in the two towns who favor the bond issue.