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 ...

In presidential elections, even the smallest changes in horse-race poll results seem to become imbued with deep meaning. But they are often overstated. Pollsters ...

If there is one thing we can all agree about following the presidential election, it's that the polls - and the news media reporting them - were nearly all wrong. This is bad news for the news media, ...