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Describe the chi-square goodness-of-fit test.
This is a nonparametric test normally used in a situation where one variable and a nominal data
are present. If I am to understand the text correctly, the question this test helps answer is whether
observed differences are greater than would occur simply by chance. In general Chi-square is a
test of whether the observed frequency of values differs from its expected frequency. In the case
of goodness of fit tests the expected frequency is supplied (e.g. a table of values that come from a
statistical model of some kind) and ...