已选分类
管理学工商管理
单选题What is the value of the two-digit num-ber x? (1)The sum of the two digits is 4. (2)The difference between the two digits is 2.
单选题149 people were aboard Flight 222 when it arrived at Los Angeles from New York City with Chicago as the only intermediate stop. How many people first boarded the flight in Chicago? (1)170 people were aboard the flight when it left New York City. (2)23 people from the flight deplaned in Chicago and did not reboard.
单选题A rectangle with dimensions 24 inches by 42 inches is to be divided into squares of equal size. Which of the following could be a length of a side of the squares?
单选题普查是为了某种特定的目的而( )。 A．专门组织的一次性全面调查 B．专门组织的经常性全面调查 C．非专门组织的一次性全面调查 D．非专门组织的经常性全面调查
单选题某国参加北京奥运会的男女运动员的比例原为19:12，由于先增加若干名女运动员，使男女运动员比例变为20:13，后又增加了若干名男运动员，于是男女运动员比例最终变为30:19．如果后增加的男运动员比先增加的女运动员多3人．则最后运动员的总人数为( )．
单选题Which of the following procedures is always equivalent to adding 5 given numbers and then dividing the sum by 5? Ⅰ Multiplying the 5 numbers and then finding the 5 th root of the product. Ⅱ Adding the 5 numbers, doubling the sum, and then moving the decimal point one place to the left. Ⅲ Ordering the 5 numbers numerically and then selecting the middle number. (A) None (B) Ⅰonly (C) Ⅱonly (D) Ⅲonly (E) ⅠandⅢ
单选题统计数据整理阶段的关键问题是( )。 A．对调查资料的审核与筛选 B．统计分组 C．统计汇总 D．编制统计表
单选题就单相关而言，相关系数r与判定系数r2( )。 A．无关系 B．可以以r推断r2 C．可以互相推导 D．是完全相同的
单选题Inthefigureabove,QRSisastraightlineand1ineTRbisects∠PRS.IsittruethatlinesTRandPQareparallel?(1)PQ=PR(2)QR=PR
单选题动态相对指标是指( )。 A．同一现象在不同时间不同空间上的对比 B．同一现象在同时间不同空间上的对比 C．不同一现象在不同时间同空间上的对比 D．同一现象在不同时间同空间上的对比
单选题某企业所属的4个生产同一产品的车间将其同月产量绘制图形最好选用( )。 A．箱线图 B．折线图 C．直方图 D．条形图
单选题将分布数列分为品质分布数列和变量分布数列的依据是( )。 A．分组的方法 B．分组的组限 C．分组的组距 D．分组标志的特征
单选题There are 4 card-processing machines in an office. The fastest of these machines processes x cards in 7 hours and the slowest processes x cards in 8 hours. Which of the following could NOT be the average time per machine for each of the 4 machines to process x cards? (A) 7.2 (B) 7.3 (C) 7.5 (D) 7.6 (E) 7.7
单选题Intheadditionproblemabove,eachofthesymbols□,△,and★representsapositivedigit.If□＜A,whatisthevalueof△?(1)★=4(2)□=1
单选题在实际工作中，计算不重复抽样的抽样平均误差但采用重复抽样的公式的情况是( )。 A．样本单位数占总体单位数的比重很小时 B．样本单位数占总体单位数的比重很大时 C．样本单位数目很少时 D．样本单位数目很多时
单选题If the two-digit integers M and N are positive and have the same digits, but in reverse order, which of the following CANNOT be the sum of M and N?
单选题Which of the following, if true, best reconciles the discrepancy between the increase in unemployment and the increase in jobs in the manufacturing industry of Alameda?
单选题Larry saves x dollars per month. Will Larry's total savings one year from now exceed his present savings by at least $500? (Assume that there is no interest.) (1)In 6 months Larry's total savings will be $900. (2)In 3 months Larry's total savings will exceed his present savings by $150. (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．
单选题居民收入与储蓄额之间的相关系数可能是( )。 A．-0.9247 B．0.9247 C．-1.5362 D．1.5362
单选题在一元线性回归分析中，计算估计标准误差所使用的自由度为 A．n B．n-p C．n-p-1 D．n-p+1