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chi-square

The definition of chi-square is a results statistics test used to show if unproven results are as expected or unusual.

(noun)

An example of chi-square is using a table to show whether or not a six sided die will land on the three side once out of every six times it is rolled.

See chi-square in Webster's New World College Dictionary

noun

a statistical method used to test whether the classification of data can be ascribed to chance or to some underlying law

See chi-square in American Heritage Dictionary 4

noun

A test statistic that is calculated as the sum of the squares of observed values minus expected values divided by the expected values.

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