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4 Cards in this Set
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- Back
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chi-square test for goodness of fit
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uses sample data to test hypotheses about the shape or proportions of a population distribution; the test determines how well the obtained sample proportions fit the population proportions specified by the null hypothesis
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observed frequency
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the number of individuals from the sample who are classified in a particular category; each individual is counted in one and only one category
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expected frequency
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the frequency value that is predicted from the null hypothesis and the sample size (n); the expected frequencies define an ideal, hypothetical sample distribution that would be obtained if the sample proportions were in perfect agreement with the proportions specified in the null hypothesis
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chi-square test for independence
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uses the frequency data from a sample to evaluate the relationship between two variables in the population
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