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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热门试题

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

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