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Chi-Square Goodness-of-Fit Test

Phillip E. Pfeifer
Published 2008 · Mathematics
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This note describese the chi-square statistic as applied to goodness-of-fit tests. Goodness-of-fit tests check to see how closely a sample matches a particular probability distribution (e.g., normal, Poisson, binomial). Excerpt UVA-QA-0692 Rev. Apr. 14, 2017 Chi-Square Goodness-of-Fit Test This note describes the chi-square statistic as applied to “goodness-of-fit�? tests. Goodness-of-fit tests check to see how closely a sample matches a particular probability distribution (e.g., normal, Poisson, binomial). While not the most sophisticated test, the chi-square test is easy to implement. The Public Opinion Poll A survey of randomly selected voters revealed that candidate B had a 5-point lead over candidate A and a 10-point lead over candidate C (Table 1). How much should we make of these differences given that the poll involved only 300 voters? . . .
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