National public opinion polls are often based on as few as 1,500 persons in a random sampling of public sentiment on issues of public interest. These surveys are often done in person because the response rate for a mailed survey is very low and telephone interviews tend to reach a larger proportion of older persons than would be represented in the public as a whole. Suppose a random sample of n = 1,500 registered voters was surveyed about energy issues, and 230 of the 1500 responded that they would favor drilling for oil in national parks.What is the 95% margin of error in your estimate in question 20, rounded to 3 decimals?