chi-square

[kahy-skwair]
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noun Statistics.

a quantity equal to the summation over all variables of the quotient of the square of the difference between the observed and expected values divided by the expected value of the variable.

Origin of chi-square

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Medicine definitions for chi-square

chi-square

n.

A test statistic that is calculated as the sum of the squares of observed values minus expected values divided by the expected values.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for chi-square

chi-square

[kīskwâr]

A test statistic that is calculated as the sum of the squares of observed values minus expected values divided by the expected values.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.