Wiki Page, Math 13 - Perez Sandbox : Description of the calculation of Chi-square

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2026-01-17T21:14:56-08:00

The formula for Chi-square on the page Module 27 - Chi-Square Test of Independence (2b of 3) is

Chi square equals one over 541.5 times the square of the difference of 560 and 541.5, plus one over 148.8 times the square of the difference of 163 and 148.8, plus one over 69.67 times the square of the difference of 37 and 69.67, plus one over 313.5 times the square of the difference of 295 and 313.5, plus one over 86.17 times the square of the difference of 72 and 86.17, plus one over 40.33 times the square of the difference of 73 and 40.33, which equals 47.18.