Parametric/Nonparametric Tests. Chi-Square Test. It is a technique through the use of which it is possible for all researchers to: test the goodness of fit; Test the significance of association between two attributes; and Test the homogeneity or the significance
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between two attributes; and
of population variance.
Ho: σ2s = σ2p
σ2s = Variance of the sample;
σ2p = Variance of the population;
(n-1) = Degrees of freedom, n being the number of items in the sample.
We may be interested in knowing whether a new medicine is effective in controlling fever or not, X2 test will help us in deciding this issue.
(n-1) = (6-1) = 5.