University of Melbourne provides funding as a founding partner of The Conversation AU. There are two things that affect the margin of error (MOE). They are the poll ...

Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

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 ...

This article originally appeared on Undark. When pollsters, journalists, and pundits want to signal that an opinion poll may not be right on target, they often turn ...