Error bars illustrate the margin of error for a survey estimate by showing how precise that estimate is. Here are some answers to common questions that might help you better understand charts with ...

As Americans await election results, many are looking to the polls for answers. JUMP TO: MARGIN OF ERROR l PHONE/DIGITAL l OUTLIER POLLS Dr. Andy Smith, from the University of New Hampshire Survey ...

As Americans await the presidential election results, many are looking to the polls for clues. A poll’s margin of error describes how close a survey result can ...