A.Summarising data
B.Displaying aspects of the collected data
C.Reporting numerical findings
D.Estimating characteristics of the population
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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
A.population
B.sample
C.parameter
D.statistic
A.a parameter
B.a statistic
C.a population
D.Both A and C are correct，since they are the same
最新試題
變量數(shù)列中，各組頻率之和應（）
Which of the following is not the goal of descriptive statistics?（）
If data are grouped into intervals and the number of items in each group is listed, this could be called 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？
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 （）.
要了解某地區(qū)全部大學生的就業(yè)情況，那么（）
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（）
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 （）.
If the individual class frequency is divided by the total frequency, the result is the （）.
A cumulative frequency polygon is also called （）.