单项选择题

Describing and tabulating are associated with ______.

A．inferential statistics
B．descriptive statistics
C．theories of probability
D．inefficiency of counting
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单项选择题
What is the passage mainly concerned with
A．Development and application of statistics.
B．Origin of descriptive statistics.
C．Limitations of inferential statistics.
D．Importance of statistics.
单项选择题
A sample of a population is often examined for the following purposes except ______.
A．to make a more accurate prediction of trend
B．to improve efficiency and avoid unnecessary work
C．to save the trouble of approaching every member
D．to predict characteristics of the entire population
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