A.2.14
B.5.66
C.7.28
D.15
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A.7%
B.8%
C.9%
D.10%
A.样本空间
B.事件
C.实验
D.概率
A.95%
B.89%
C.68%
D.99%
A.
B.
C.
D.
某汽车交易市场共发生了150项交易,将销售记录按付款方式及汽车类型加以区分如下:
如果从销售记录中随机抽取一项,该项是分期付款的概率是()
A.0.95
B.0.5
C.0.8
D.0.25
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, 用()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.A与B相互独立
B.A与B不独立
C.A与B相互排斥
D.A与B相关
A.统计资料的收集和分析
B.理论统计和运用统计
C.统计预测和决策
D.描述统计和推断统计
最新试题
常用的长期趋势测定的方法有哪些?各有什么特点?
A cumulative frequency polygon is also called ().
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()
某班的学习按考试成绩分为60分以下,60-70,70-80,80-90,90-100,这种分组()
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 is not the goal of descriptive statistics?()
要了解某地区全部大学生的就业情况,那么()
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 ().
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()
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?()