A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large production line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a:
A. parameter.
B. statistic.
C. sample.
D. population.
Analysis:
A. Incorrect This represents a sample.
B. Incorrect This represents a sample.
C. Correct. This represents a sample.
D. Incorrect This represents a sample.
ANSWER : C
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