A poll of a politician declares that he or she has 75 percent approval with a margin of error of plus or minus 3 What does this mean? His approval rating is almost certainly between 72 and 78. He has a real approval rating of 3 percent. square She definitely has 78 percent approval.

The correct answer is: His approval rating is almost certainly between 72 and 78.<br /><br />Explanation: The margin of error of plus or minus 3 means that the true approval rating of the politician is likely to be within 3 percentage points of the reported 75 percent. Therefore, the approval rating is almost certainly between 72 percent (75 - 3) and 78 percent (75 + 3).