The Kappa statistic is used in statistics to assess the correlation between two sets of data. The Kappa statistic is based on the findings of a study by Karl Pearson, who proposed that the average difference between two sets of data can be simplified into a product of two random variables.
The kappa statistic is used to determine the level of agreement between two sets of data, and ranges from 0 (no agreement) to 1 (complete agreement).
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