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  3. What is the passage mainly concerned with? Which of the following, statements is true about descriptive statistics?

What is the passage mainly concerned with? Which of the following, statements is true about descriptive statistics?

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问题 What is the passage mainly concerned with?
Which of the following, statements is true about descriptive statistics?
选项 A、It combines quantitative variables and qualitative variables,
B、It can be used to deal with only quantitative variables
C、It helps to summarize properties of a group of data.
D、It helps to make predictions using a sample of observations.
答案C
解析 分析判断题。对比分析，存真去伪。仔细比较四个选项。A“它将数量变量和质量变量结合起来了”，这误解了第二段中第二句话"either…or…”句型，要么是数量变量，要么是质量变量；B“它只能用来处理数量变量”，也与上面句型含义相悖：C“它有助于总结一组数据的特征”，这正是第二段最后一句话"large masses of data… the properties of an otherwise unwieldy mass of data."的含义；D“它有助于使用观察抽样进行预测”，这是推理性统计，所以选C。
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大学英语六级

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