单项选择题

In Paragraph 4, second line, "yakking away" most probably means ______.

A．driving carelessly
B．talking senselessly
C．laughing loudly
D．sitting in a relaxed manner
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单项选择题
Which of the following might be the best title for this passage
A．How to Use Descriptive Statistics
B．Applications of Inferential Statistics
C．The Development and Use of Statistics
D．The Drawbacks of Descriptive and Inferential Statistics
单项选择题
What is the purpose of examining a sample of a population
A．To tabulate collections of data
B．To compare different groups
C．To consider all the quantitative variables
D．To predict characteristics of the entire population
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