A.同質(zhì)性
B.互斥性
C.完備性
D.分散性
E.整齊性
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A.抽簽法
B.搖獎(jiǎng)法
C.配對法
D.配額法
E.隨機(jī)數(shù)表法
A.實(shí)際經(jīng)濟(jì)增長率
B.通貨膨脹率
C.失業(yè)率
D.痛苦指數(shù)
A.取值都在0與1之間
B.均值為0
C.均值為1
D.標(biāo)準(zhǔn)差為1
A.2％
B.0.5％
C.5％
D.4.8％
A.總指數(shù)大于所有的個(gè)體指數(shù)
B.總指數(shù)小于所有的個(gè)體指數(shù)
C.總指數(shù)介于個(gè)體指數(shù)的最大值與最小值之間
D.上述三種情況都可能發(fā)生
最新試題
If the individual class frequency is divided by the total frequency, the result is the （）.
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)？
某企業(yè)2018年技術(shù)工占50%，2019年新招收了一批學(xué)徒工，使學(xué)徒工的比重增加了10%。假定全廠各級工資水平均無變化，則2019年職工總平均工資將（）
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 （）.
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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？
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
某班的學(xué)習(xí)按考試成績分為60分以下，60-70，70-80，80-90，90-100，這種分組（）
Descriptive statistics deals with methods of（）
Simon Arnett, Director of Human Resources, is exploring the causes of employee absenteeism at Buderim Bottling during the last operating year (1 January 2005 to 31 December 2005). Personnel records of 50 employees are selected for analysis. (The plant employs 250.) For this study, the average number days absent for these 50 employees is a （）.