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Descriptive statistics deals with methods of（）
在組距數(shù)列中，下限就是（）
品合格率指標(biāo)是（）
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個(gè)車間，這四個(gè)車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少？
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour？（）
Which of the following statements is not true？（）
One rule that must always be followed in constructing frequency distributions is that （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
A student achieves an 82 on the first test in a statistics course. From this, she assumes that her average at the end of the semester (after other tests) will be about 82. This is an example of （）.