判断题

样本指标是随机变量，它只与给定的样本有关。()

答案：正确

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单项选择题

As he had worked in the army as an electrical engineer for many years, he had every____ for the job.

A) privilege
B) obligation
C) qualification
D) quality

反映数据分布的偏斜方向和程度的统计量是偏度系数。()

答案：正确