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Cheyne-Stokes respiration
chez
chg.
Chhattisgarh
chi (1)
chi (2)
Chi-lung
Chi-Rho
chi-square
chi-square distribution
Chianti
chiapanecas
Chiapas
chiaroscuro
chiasma
chiasmus
chiastolite
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chi-square

chi-square [ k skwèr ] (plural chi-squares)


noun 
Definition:
 
statistical calculation: a statistical calculation used to test how well the distribution of a set of observed data matches a theoretical probability distribution. The calculated value is equal to the sum of the squares of the differences divided by the expected values.

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