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Hypothesis Tests Concerning Variance
The chi-square test statistic (??2). Asymmetrical, df = n ? 1, bounded below by 0.
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[Practice Problems] A chi-square test is most appropriate for tests concerning:
A. a single variance.
B. differences between two population means with variances assumed to be equal.
C. differences between two population means with variances assumed to not be equal.
[Solutions] A
A chi-square test is used for tests concerning the variance of a single normally distributed population.
341Hypothesis Tests Concerning Differences between Means:normally distributed:[PracticeB.C.comparisons test is appropriate.
295Hypothesis Tests Concerning the Mean:μrelying on the central limit theorem is
262Hypothesis Tests Concerning Variance:test statistic ??2.:[PracticeB.C.the variance of a single normally distributed population.
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