(D) It measures only qualitative differences.
9. The word "unwieldy" in line 15 is closest in meaning to
(A) unmanageable
(B) unpredictable
(C) understandable
(D) unreliable
10. According to the passage, what is the purpose of examining a sample of a population?
(A) To compare different groups
(B) To predict characteristics of the entire population
(C) To detect differences not observable in the whole population
(D) To compile more accurate data
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