A.總標(biāo)題
B.橫行標(biāo)題
C.縱欄標(biāo)題
D.數(shù)據(jù)資料
E.表末附注
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A.同質(zhì)性
B.互斥性
C.完備性
D.分散性
E.整齊性
A.抽簽法
B.搖獎法
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％
最新試題
一個(gè)地區(qū)一定時(shí)期的商品零售額屬于（）
A cumulative frequency polygon is also called （）.
The number of class intervals in a frequency distribution is usually between （）.
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)？
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). The average number of absences per employee, calculated from the personnel data of all employees, is a （）.
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 （）.
Which of the following statements is not true？（）
對某班級學(xué)生的生活狀況進(jìn)行統(tǒng)計(jì)調(diào)查，下列標(biāo)志中屬于不變標(biāo)志的是（）
變量數(shù)列中，各組頻率之和應(yīng)（）
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 cumulative frequency of the third class？（）