chi-square
[ kahy-skwair ]
/ ˈkaɪˌskwɛər /
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
Words nearby chi-square
chi,
chi kung,
chi meson,
chi particle,
chi-rho,
chi-square,
chi-square distribution,
chi-square test,
chi-tse,
chia,
chiack
Example sentences from the Web for chi-square
In a fourfold table, the value of chi-square (14.7) is significant and indicates that the frequencies are not proportional.
The Biotic Associations of Cockroaches |Louis M. RothThe significance of each difference reported was calculated by the Chi-square test and the confidence limit is given in each case.
Medical 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.
Scientific definitions for chi-square
chi-square
[ kī′skwâr′ ]
A test statistic that is calculated as the sum of the squares of observed values minus expected values divided by the expected values.