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chi-square test
(redirected from Chi-squared test)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
chi-square test
n.
A test that uses the chi-square statistic to test the fit between a theoretical frequency distribution and a frequency distribution of observed data for which each observation may fall into one of several classes.

chi-square test
n
(Mathematics & Measurements / Statistics) Statistics a test derived from the chi-square distribution to compare the goodness of fit of theoretical and observed frequency distributions or to compare nominal data derived from unmatched groups of subjects


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Suppose I have a set of data like this: Example n n with symptom x Males < 45 yrs 124 11 Males > 45 57 12 Females < 45 153 9 Females > 45 67 10 For this set of data, you might use a chi-squared test to find out if these four groups are the same.
A standard chi-squared test, perhaps, and if so, on how many subjects?
1977, Generalized Inverses, Wald's Method and the Construction of Chi-Squared Tests of fit, Journal of Statistical Association, 7, pp.
 
 
 
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