Williams Correction Factor Calculator

The chi-square tests and g square tests are used to compare the original values with the predicted values and find the variations. When the type 1 error is high, William suggested to divide the chi-square or g-test values by a correction factor which can be calculated using degrees of freedom , number of categories and observation.

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q = 1+(a2 - 1)/(6 * n * v) Where, q = Williams Correction Factor a = Number of Categories n = Total Sample Size v = Number of Degrees of Freedom

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