已选分类
管理学工商管理
单选题某工厂定期购买一种原料．已知该厂每天需用该原料6吨，每吨价格1800元，原料的保管等费用平均每天每吨3元，每次购买原料需支付运费900元．若该厂要使平均每天支付的总费用最省，则应该每( )天购买一次原料．
单选题根据70/%的抽样资料，甲产品的一级品比例为30/%，乙产品的一级品比例为20/%，在所抽样产品数相等的条件下，一级品比例抽样误差( )。 A．甲产品较大 B．乙产品较大 C．相同 D．无法作出结论
单选题4．若要了解某地区居民收入水平，则采用( )方式比较适合。 A．普查 B．重点调查 C．统计报表制度 D．抽样调查
单选题How many of the integers between 25 and 45 are even? (A) 21 (B) 20 (C) 11 (D) 10 (E) 9
单选题某厂生产的化纤纤度服从正态分布N(μ，σ2)。现测得25根纤维的纤度的均值为1.39，如果要检验这些纤维的纤度与原设计的标准值1.40有无显著差异，则合理的零假设与备择假设应为： A．H0：μ＞1.40 H1：μ＜1.40 B．H0：μ＜1.40 H1：μ＞1.40 C．H0：μ≥1.40 H1：μ＜1.40 D．H0：μ=1.40 H1：μ≠1.40
单选题One way to judge the performance of a company is to compare it with other companies. This technique, commonly called “benchmarking,” permits the manager of a company to discover better industrial practices and can provide a justification for the adoption of good practices.
Any of the following, if true, is a valid reason for benchmarking the performance of a company against companies with which it is not in competition rather than against competitors EXCEPT:
单选题
下列商品中，进行广告宣传时不需要进行行政性审查的是：（ ）
A、药品 B、医疗器械 C、农药﹑兽药 D、各种电器
单选题Each of the integers from 0 to 9, inclusive, is written on a separate slip of blank paper and the ten slips are dropped into a hat. If the slips are then drawn one at a time without replacement, how many must be drawn to ensure that the numbers on two of the slips drawn will have a sum of 10? (A) Three (B) Four (C) Five (D) Six (E) Seven
单选题Consumer income reports produced by the government distinguish between households and families by means of the following definition: “A family is a household containing a householder and at least one person related to the householder.” Except for the homeless and people in group living quarters, most people live in households.
According to the definition above, which of the following must be true?
单选题Amandrovehisautomobiled1kilometersattherateofr1kilometersperhourandanadditionald2kilometersattherateofr2kilometersperhour.Intermsofd1,d2,r1,r2,whatwashisaveragespeed,inkilometersperhour,fortheentiretrip?(E)Itcannotbedeterminedfromtheinformationgiven．
单选题WhatfractionalpartofthetotalsurfaceareaofcubeCisred?(1)Eachof3facesofcisexactlyred.(2)Eachof3facesofCisentirelywhite.(A)条件(1)充分，但条件(2)不充分．(B)条件(2)充分，但条件(1)不充分．(C)条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．(D)条件(1)充分，条件(2)也充分．(E)条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
单选题 The following data sufficiency problems consist of a
question and two statements, labeled (1) and (2), in which certain data are
given. You have to decide whether the data given in the statements are
sufficient for answering the question. Using the data given in the statements
plus your knowledge of mathematics and everyday facts (such as the number of
days in July or the meaning of counterclockwise), you must indicate
whether Ａ. Statement (1) ALONE is sufficient, but statement (2)
alone is not sufficient. Ｂ. Statement (2) ALONE is sufficient,
but statement (1) alone is not sufficient. Ｃ. BOTH statements
TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
Ｄ. EACH statement ALONE is sufficient. Ｅ. Statements (1)
and (2) TOGETHER are NOT sufficient.
单选题How many two-digit whole numbers yield a remainder of 1 when divided by 10 and also yield a remainder of 1 when divided by 6? (A) None (B) One (C) TWO (D) Three (E) Four
单选题 Brand X Brand Y Miles per Gallon 40 36 Cost per Gallon $0.80 $0.75 The table above gives the gasoline costs and consumption rates for a certain car driven at 50 miles per hour, using each of two brands of gasoline. How many miles further can the car be driven at this speed on $12 worth of brand X gasoline than on $12 worth of brand Y gasoline?
单选题Shortly after the Persian Gulf War, investigators reported that the area, which had been subjected to hundreds of smoky oil fires and deliberate oil spills when regular oil production slowed down during the war displayed less oil contamination than they had witnessed in prewar surveys of the same area. They also reported that the levels of polycyclic aromatic hydrocarbons (PAHs)—used as a marker of combustion products spewed from oil wells ignited during the war—were also relatively low, comparable to those recorded in the temperate oil-producing areas of the Baltic Sea.
Which one of the following, if true, does most to resolve the apparent discrepancy in the information above?
单选题根据分析方法的不同，统计学的两大基本内容是( )。 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
单选题企业支付的产品广告费属于（）
单选题回归直线拟合的好坏取决于SSR、SSE及SST的大小，其关系是 A．SSR/SST越大，直线拟合得越好 B．SSR/SST越小，直线拟合得越好 C．SSE越大，直线拟合得越好 D．SST越大，直线拟合得越好
单选题Town T has 20,000 residents, 60 percent of whom are female. What percent of the residents were born in Town T? (1)The number of female residents who were born in Town T is twice the number of male residents who were not born in Town T. (2)The number of female residents who were not born in Town T is twice the number of male residents who were born in Town T.
单选题Human beings can see the spatial relations among objects by processing information conveyed by light. Scientists trying to build computers that can detect spatial relations by the same kind of process have so far designed and built stationary machines. However, these scientists will not achieve their goal until they produce such a machine that can move around in its environment.
Which of the following, if true, would best support the prediction above?