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statistical independence

A Dictionary of Sociology | 1998 | 328 words | Copyright

statistical independence Two variables (i and j) are statistically independent if the proportion who are both i and j (pij) is equal to the proportion who are i multiplied by the proportion who are j (pij = pi × pj or pij − pi × pj = 0). This principle forms the basis of the popular χ2 (chi-square) test.

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