1. statistic
Wikipedia definition
2. StatisticA statistic (singular) is a single measure of some attribute of a sample (e.g. its arithmetic mean value). It is calculated by applying a function to the values of the items comprising the sample which are known together as a set of data. More formally, statistical theory defines a statistic as a function of a sample where the function itself is independent of the sample's distribution; that is, the function can be stated before realization of the data.
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Read “統計量” on Japanese Wikipedia
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