已选分类
管理学工商管理
单选题Technically a given category of insurance policy is underpriced if, over time, claims against it plus expenses associated with it exceed total income from premiums. But premium income can be invested and will then yield returns of its own. Therefore, an underpriced policy does not represent a net loss in every case.
The argument above is based on which of the following assumptions?
单选题用简单随机重复抽样方法选取样本单位，如果要使抽样平均误差降低50/%，则样本容量需要扩大到原来的( )。 A．2倍 B．3倍 C．4倍 D．5倍
单选题在组距分组时，对于连续性变量，相邻两组的组限( )。 A．必须是重叠的 B．必须是间断的 C．可以是重叠的，也可以是间断的 D．必须取整数
单选题If a motorist had driven 1 hour longer on a certain day and at an average rate of 5 miles per hour faster, he would have covered 70 more miles than he actually did. How many more miles would he have covered than he actually did if he had driven 2 hours longer and at an average rate of 10 miles per hour faster on that day? (A) 100 (B) 120 (C) 140 (D) 150 (E) 160
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单选题若以某市工业企业为总体，则该市工业总产值是( )。 A．总体 B．标志 C．指标 D．变量值
单选题如果回归标准误差Syx=0，则表明( )。 A．全部观测值和回归值都不相等 B．回归值代表性小 C．全部观测值和回归值的离差之积为零 D．全部观测值都落在回归直线上
单选题如果一个统计量能把含在样本中有关总体的信息完全提取出来，那么这种统计量称为( )。 A．充分统计量 B．无偏估计量 C．有效统计量 D．一致估计量
单选题在回归分析中，两个变量( )。 A．都是随机变量 B．都不是随机变量 C．自变量是随机变量 D．因变量是随机变量
单选题A rectangle with dimensions 75 inches by 100 inches is divided into 20 smaller rectangles. If each new rectangle has equal dimensions, how many inches of lines are needed to divide the original rectangle? (1)One of the dimensions of each of the rectangles is 15 inches. (2)One of the dimensions of each of the rectangles is 25 inches.
单选题If r=23·52·7 and s=22·32·5, which of the following is equal to the greatest common divisor of r and s?
单选题8．“统计”一词的基本涵义是( )。 A．统计调查、统计整理、统计分析 B．统计设计、统计分组、统计计算 C．统计方法、统计分析、统计计算 D．统计学、统计工作、统计资料
单选题统计分析报告普遍运用的表达方式是( )。 A．深刻描写 B．论证说明 C．叙述、说明、议论 D．记述、批驳、说明
单选题Thepositiveintegernisdivisibleby25.Ifisgreaterthan25,whichofthefollowingcouldbethevalueof?(A)22(B)23(C)24(D)25(E)26
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单选题In Bassaria a group of that country"s most senior judges has criticized the uniform mandatory sentences recently introduced for certain specific crimes. The judges argue that such sentences, by depriving them of all discretion in setting sentences, make it impossible for them to consider either aggravating or extenuating circumstances and so make it impossible to achieve true justice — the fitting of the severity of the punishment to the gravity of the particular crime.
Which of the following, if true, provides the strongest evidence for the claim that in Bassaria the newly introduced mandatory sentences are not necessarily a change for the worse with respect to achieving true justice as defined in the argument?
单选题The total cost for Company X to produce a batch of tools is $10,000 plus $3 per tool. Each tool sells for $8. The gross profit earned from producing and selling these tools is the total income from sales minus the total production cost. If a batch of 20,000 tools is produced and sold, then Company X's gross profit per tool is
单选题影响抽样误差大小的因素有多个，N很大时，影响最大的是( )。 A．抽样的方法 B．抽样的组织方式 C．抽样单位数 D．抽样比
单选题Is a+b+C+d equal to 4? (1)a, b, c, and d are each positive. (2)The product abcd equals 1.
单选题商品销售额实际增加400元，由于销售量增长使销售额增加120元，由于价格( )。 A．增长使销售额增加20元 B．增长使销售额增长280元 C．降低使销售额减少20元 D．降低使销售额减少280元