单项选择题

Which of the following is true of descriptive statistics

A．It leads to increased variability
B．It solves all numerical problems
C．It simplifies unwieldy masses of data
D．It changes qualitative variables to quantitative variables

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单项选择题

Which of the following are counting and describing associated with

A．Descriptive statistics
B．Unknown variables
C．Qualitative changes
D．Inferential statistics

单项选择题

Why does the author mention the mother and father in the first paragraph

A．To present the background of statistics in a humorous and understandable way
B．To point out that parents can teach their children statistics
C．To explain that there are different kinds of variables
D．To introduce inferential statistics