A.足够大时
B.足够小时
C.无论大与小
D.无法判断
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A.随机误差
B.抽样框误差
C.回答误差
D.无回答误差
五位部门经理的年收入如表:要描述五位部门经理的年收入的一般水平,()来测度这一集中趋势比较合适。
A.众数
B.中位数
C.平均数
D.极差
A.大于
B.小于
C.等于
D.不能确定大于或小于
A.纯随机抽样
B.等距抽样
C.分层抽样
D.整群抽样
最新试题
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()
If the individual class frequency is divided by the total frequency, the result is the ().
如果居民按报告期价格购买商品需多支出40万元,报告期商品销售额为200万元,则价格指数为()
A cumulative frequency distribution would provide().
A cumulative frequency polygon is also called ().
Descriptive statistics deals with methods of()
品合格率指标是()
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 ().
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?()
某企业的生产计划完成百分比采用如下分组,请指出哪项是正确的()