In testing the difference between two population variances are unknown and not assumed to be equal, two independent samples are drawn from the populations. Which of the following tests is appropriate?

A. z-test.
B. pooled variances t-test.
C. unequal variances t-test.
D. None of these choices.


Analysis:
A. Incorrect. The unequal variances t-test is appropriate.
B. Incorrect. The unequal variances t-test is appropriate.
C. Correct. The unequal variances t-test is appropriate.
D. Incorrect. The unequal variances t-test is appropriate.
ANSWER C

Business

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Business

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