Prob chart. For both lines, the slope is greatest near 50%. Reading off the chart, the probability of winning with a poll of sample size 1100 is around 25% if the poll result was 49%, but improves ...

Key Points The margin of error allows you to use smaller sample sizes when conducting customer surveys. The measurement directly relates to the size of your sample, with larger sample sizes ...

Let’s say 49 percent of people are going to vote for Obama. But we have a margin of plus or minus 3 percentage points. What that means is if we kept taking samples, 95 percent of the time, we ...

Israel-Iran live updates: Trump says 'MAKE IRAN GREAT AGAIN,' hints at regime change ...

You can’t get into an argument about polls without some wise guy whipping out the “margin of error” to shut down the other side. But what is the margin of error, exactly? (Or, as Gilda ...

How do I know if a candidate’s lead is ‘outside the margin of error’? News reports about polling will often say that a candidate’s lead is “outside the margin of error” to indicate that a candidate’s ...

As the director of the Quinnipiac University Poll, which has been taking the pulse of the public on policy issues and elections for the past 30 years, I’ve noted that people have been paying ...