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A.中位数检验
B.曼-惠特尼U检验
C.K-S检验
D.Kruskal-Wallis检验
E.Jonckheere-Terpstra检验
A.发病率
B.性别
C.年龄段
D.居住地区
E.工作环境
A.单样本t检验是对样本来自的总体的均值检验
B.单样本t检验中要求数据只包含一个个案
C.单样本t检验要求样本来自的总体服从或近似服从正态分布
D.单样本t检验中原假设是总体均值与检验值存在显著差异
E.单样本t检验可以对总体比例进行检验
A.反映集中趋势的描述统计量
B.反映总规模总水平的描述统计量
C.反映离散程度的描述统计量
D.反映分布形态的描述统计量
A.数据拆分选择的菜单是Data-Split File
B.数据拆分的本质就是对数据按拆分变量进行排序
C.数据拆分的本质是将一个数据文件分成了若干个独立的数据文件
D.数据拆分对后面的分析一直起作用,直到取消拆分为止
A.排序只针对某列变量进行
B.多重排序中排序变量的次序与排序结果无关
C.排序是对整行数据排序
D.第一个排序变量也称为主排序变量
E.通过数据排序能快捷地发现数据中的异常值
最新试题
If the individual class frequency is divided by the total frequency, the result is the ().
企业生产一种产品需顺次经过四个车间,这四个车间的废品率分别为1.5%、2.0%、2.0%和1.0%。该企业生产这种产品的平均废品率是多少?
One rule that must always be followed in constructing frequency distributions is that ().
Which of the following statements is not true?()
A cumulative frequency polygon is also 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 approximate range of the number of phone calls arriving each hour?()
常用的长期趋势测定的方法有哪些?各有什么特点?
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
变量数列中,各组频率之和应()
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 ().