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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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• MSc , Pune University, India
• PhD (IP), Pune University, India
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