Question

describe chi- square

Answer 1

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A chi-squared test, also written as χ² test, is any statistical hypothesis test where the sampling distribution of the test statistic is a chi-squared distribution when the null hypothesis is true. Without other qualification, 'chi-squared test' often is used as short for Pearson's chi-squared test.

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Answer 2

A chi square statistic is a measurement of how expectations compare to results. The data used in calculating a chi square statistic must be random, raw, drawn from independent variables, and drawn from a large enough sample