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
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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
下面的数据文件显示了在美国匹兹堡大学30名MBA考生的信息。第一列给出身高(英寸),第二列给出MBA刚刚就业后的月收入(数据来源于华尔街日报,12月30日)
写出MBA身高与初始月收入的线性回归方程。最新试题
One advantage of a stem and leaf plot over a frequency distribution is that ().
Claudia Taylor, Director of Global Industrial Sales in Melbourne, is concerned by a deteriorating sales trend. Specifically, the number of customers is stable at 1500 but they are purchasing less each year. She orders her staff to search for causes of the downward trend by selecting a focus group of 40 industrial customers. For this study, the set of 40 industrial customers is a ().
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 ().
The number of class intervals in a frequency distribution is usually between ().
最能反映离散程度的指标是()
One rule that must always be followed in constructing frequency distributions is that ().
Which of the following is best to show the percentage of a total budget that is spent on each category of items?()
Descriptive statistics deals with methods of()
某企业2018年技术工占50%,2019年新招收了一批学徒工,使学徒工的比重增加了10%。假定全厂各级工资水平均无变化,则2019年职工总平均工资将()
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?()