# 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

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

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