您可能感兴趣的试卷
最新试题
某厂某年职工劳动生产率为20000元，是历史最高水平的1.2倍。这里的1.2倍是（）
One rule that must always be followed in constructing frequency distributions is that （）.
以2000年a0为最初水平，2016年an为最末水平，计算钢产量的年平均发展速度时，须开（）
If the individual class frequency is divided by the total frequency, the result is the （）.
A summary measure that is computed from a sample to describe a characteristic of the population is called（）
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？（）
Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）
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 data are grouped into intervals and the number of items in each group is listed, this could be called a （）
对某班级学生的生活状况进行统计调查，下列标志中属于不变标志的是（）