A mathematical function of a set of measurements, typically used to summarize a data set or to estimate unknown parameters. The mean, the standard deviation, the correlation coefficient, and the slope of a regression line are examples of statistics.
Anything that can be computed entirely from the properties of a sample of data. The term is most often used for population parameters such as the sample mean and sample standard deviation, although minimum and vaximum values and histograms are also statistics.
A statistic is a quantity that is calculated from a sample of data. It is used to give information about unknown values in the corresponding population. It is possible to take more than one sample from the same population and the value of a statistic will in general vary from sample to sample.
Anything that can be calculated from a sample of data. The most common use of the word is for summary measures such as the sample mean and sample standard deviation, although graphical displays such as histograms are also statistics. When referring to the population mean or standard deviation, the term parameter is used. Another use of the term statistics is to describe two broad categories of data analysis: Descriptive and Inferential Statistics. Descriptive statistics involves numerical or graphical summaries of data. Inferential statistics allows one to use sample statistics to make statements about population parameters.
A statistic or stat, in role-playing games, is a piece of data which represents a particular aspect of a fictional character. That piece of data is usually a (unitless) integer or, in some cases, a set of dice.