Statistics

AbstractStatistics is a tool to show how accurate a measurement is. Particle physicists make use of statistics to know, for example, with how much probability the events under study are signal-like in a new particle search, how much improvement a new measurement gives compared with the past measurements, how powerful a new analysis method is, and how much a certain theoretical prediction is restricted. Statistics is also useful to discriminate the signal events from the background events and to estimate the number of the signal events and background events properly. Therefore, the basics of statistics are essential for experimentalists.