Sufficient statistic

A sufficient statistic is when you have some data, like a list of numbers, and you want to make a conclusion about it but don't want to look at all the numbers. To find the sufficient statistic, you look for the numbers that tell you the most information. Those numbers are the sufficient statistic. For example, if you had a list of 100 test scores from a class, the mean (average) would be a sufficient statistic because it tells you a lot about the scores without looking at all 100 scores.