已选分类
管理学工商管理
单选题A random sample of shoppers responded to the questions contained in a marketing survey. Six months later, another random sample of shoppers responded to exactly the same questions, except that the questions were now arranged in a different order. The pattern of responses to many individual questions was greatly different, thus demonstrating that a question will sometimes elicit different responses depending only on what question precedes it.
The argument above depends on which of the following assumptions?
单选题What is the smallest integer k for which 64
k
＞4
14
?
单选题目标利润定价法属于（ ）
单选题Bracken, a poisonous weed, is spreading and damaging much pastureland in the Northern Hemisphere. One potentially inexpensive and self-sustaining countermeasure is to introduce natural enemies of the plant; therefore, some scientists have proposed to control bracken by a release of brackeneating moths native to the Southern Hemisphere into brackeninfested areas in the Northern Hemisphere.
If the scientists" proposal for controlling bracken is adopted, which of the following is a necessary condition for its success?
单选题If77,777=70,707+(7.07×n),thenn(A)1,000(B)100(C)10(D)(E)
单选题若某一变量数列中，有变量值为零，则不适宜计算的平均指标有( )。 A．算术平均数 B．调和平均数 C．中位数 D．众数
单选题根据某城市电话网400次通话调查得知每次通话持续时间为5分钟，标准差为2分钟，请以95/%的把握程度估计该城市每次通话的平均持续时间为( )。 A．4.5～5.5分钟 B．4.836～5.164分钟 C．4.804～5.196分钟 D．0～11分钟
单选题If k and ω are the dimensions of a rectangle that has area 42, and if k and ω are integers such that k＞ω, what is the total number of possible values of k?
单选题Residents of an apartment complex are considering two possible plans for collecting recyclable trash.
Plan 1 - Residents will deposit recyclable trash in municipal dumpsters located in the parking lot. The trash will be collected on the first and the fifteenth days of each month.
Plan 2 - Residents will be given individual containers for recyclable trash. The containers will be placed at the curb twice a week for trash collection.
Which of the following points raised at a meeting of the residents, if valid, would most favor one of the recycling plans over the other?
单选题Last year Luis invested x dollars for one year, half at 8 percent simple annual interest and the other half at 12 percent simple annual interest. Now he wants to reinvest the x dollars for one year in the same two types of investments, but the lower rate has decreased, If the higher rate is unchanged, what fraction of the x dollars must be reinvest at the 12 percent rate s that the total interest earned from the x dollars will be the same for both years? (1)The lower rate is now 6 percent. (2)The total amount of interest earned from the two investments last year was $3,000.
单选题说明现象总的规模和水平变动情况的统计指数是( )。 A．质量指数 B．数量指数 C．平均指标指数 D．定基指数
单选题在一所规模较大的综合大学中，全体注册学生的年龄分布未知，但在一个400名学生的简单随机样本中，发现200人年龄超过20岁，下面答案中正确的是( )。 A．恰好全体注册学生的50/%超过20岁 B．全体注册学生中约50/%超过20岁，但可能偏离少许百分点 C．全体注册学生中约50/%超过20岁，但可能偏离10或20个百分点 D．无法判断
单选题年平均增长量等于累积增长量除以 A．观察值个数+1 B．观察值个数-1 C．增长量个数+1 D．增长量个数-1
单选题现在公历的某月某日与那天是星期几是随年份变化的。例如，你去年生日那天是星期日，但今年的生日就不是星期日了。如果约定：每年的1月1日是星期日，全年有52个完整的周，共364天；普通年的最后一天和闰年的最后两天都不属于任何一周。 根据上述约定，则以下哪项一定为真? Ⅰ如果某人结婚的那天是星期日，则他的结婚纪念日都是星期日。 Ⅱ如果某人的第一个工休日是星期日，并且必须连续工作六天后休息一天，则他的每个工休日都是星期日。 Ⅲ如果某人的第一个工休日是星期日，并且必须连续工作六天后休息一天，则他的每个工休日都不是星期日。
单选题当列联表为4行5列时，其自由度为( )。 A．20 B．12 C．9 D．不存在
单选题企业经济统计学的研究对象是在社会主义市场经济条件下，研究企业经济现象总体的( )，反映企业经济现象的发展过程及其规律性。 A．数量方面和数量关系 B．统计方法 C．内部结构 D．比例关系
单选题Shanna: Owners of any work of art, simply by virtue of ownership, ethically have the right to destroy that artwork if they find it morally or aesthetically distasteful, or if caring for it becomes inconvenient.
Jorge: Ownership of unique artworks, unlike ownership of other kinds of objects carries the moral right to possess but not to destroy. A unique work of art with aesthetic or historical value belongs to posterity and so must be preserved, whatever the personal wishes of its legal owner.
On the basis of their statements, Shanna and Jorge are committed to disagreeing about the truth of which one of the following statements?
单选题某学生在解方程时，误将式中的x+1看成x-1，得出的解为x＝1。那么a的值和原方程的解应是()。
单选题If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n?
(1)n is the cube of an integer.
(2)n is even.
单选题某班55名学生来自不同地区，其中，一名回族，其余均为汉族，男、女生的平均身高分别为1.6m和1.72m，则不变标志是( )。 A．家庭住址 B．民族 C．身高 D．班级