A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency
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A.ogive
B.histogram
C.frequency distribution
D.stem and leaf plot
A.Summarising data
B.Displaying aspects of the collected data
C.Reporting numerical findings
D.Estimating characteristics of the population
A.descriptive statistics
B.inferential statistics
C.nonparametric statistics
D.wishful thinking
A.One form of descriptive statistics uses graphical techniques
B.One form of descriptive statistics uses numerical techniques
C.In the language of statistics，the term population refers to a group of people
D.Statistical inference is used to draw conclusions or inferences about characteristics of populations based on sample data
A.organising data.
B.summarising data
C.presenting data in a convenient and informative way
D.doing all of the above
最新試題
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 （）.
什么是季節(jié)變動？研究它的意義何在？如何測定季節(jié)變動？
時間序列構(gòu)成因素有哪些？分解的基本原理和思路是什么？
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 （）.
最能反映離散程度的指標(biāo)是（）
某廠某年職工勞動生產(chǎn)率為20000元，是歷史最高水平的1.2倍。這里的1.2倍是（）
要了解某地區(qū)全部大學(xué)生的就業(yè)情況，那么（）
一個地區(qū)一定時期的商品零售額屬于（）
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？（）