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    Chi-squared

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    A chi-square test statistic was calculated to be 18, based on a sample variance of 20 and a hypothesized population variance of 40. How many observations were made when the sample was extracted? Which one?
    a. 9
    b. 10
    c. 36
    d. 37

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    https://brainmass.com/statistics/chi-squared-test/chi-squared-10374

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