Phi coefficient and χ²-test for the independence of two variables for 2 x 2-fields

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Fill in your number of subjects observed into the green text boxes and press the "Calculate χ²-score and P-value" button.
(Please note: If you have a 2x2 frequency table with small numbers of expected frequencies (in case the total number of observations is less than 20), you should not perform the Chi-squared test, but you should use Fisher's exact test.)

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