To get a chi square value, observed values are subtracted from expected values.

Name: To get a chi square value, observed values are subtracted from expected values.
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In a chi-square test, the observed values are compared to the expected values, but the chi-square value is calculated by squaring the difference between observed and expected values, dividing each squared difference by the expected value, and then summing all those values.

To Get a Chi Square Value, Observed Values Are Subtracted