已选分类
管理学工商管理
单选题
单选题Advertisers are often criticized for their unscrupulous manipulation of people"s tastes and wants. There is evidence, however, that some advertisers are motivated by moral as well as financial considerations. A particular publication decided to change its image from being a family newspaper to concentrating on sex and violence, thus appealing to a different readership. Some advertisers withdrew their advertisements from the publication, and this must have been because they morally disapproved of publishing salacious material.
Which one of the following, if true, would most strengthen the argument?
单选题某一多元线性回归模型有3个自变量，但其中两个自变量的相关系数达0.9，此现象为( )。 A．同方差 B．异方差 C．自相关 D．多重共线性
单选题Two children, Bob and Mary, have piggy banks into which they deposit money earned from doing odd jobs. In a certain year, both Bob and Mary each deposited $5 on the first of every month into their respective piggy banks. If these were the only deposits made into the piggy banks during the year, on December 31 does Bob have more money in his piggy bank than Mary has in her piggy bank? (Assume no withdrawals) (1)On March 15 Bob had three times as much money in his piggy bank as Mary had in hers. (2)On June 15 Bob had twice as much money in his piggy bank as Mary had in hers. (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Inthefigureabove,ifAB∥CE,CE=DE,andy=45,thenx=
单选题
单选题动态相对数是( )。 A．报告期水平与基期水平之比 B．实际数与计划数之比 C．总体部分数值与总体全部数值之比 D．甲单位水平与乙单位水平之比
单选题The chart above shows how Jeff spent his earnings for one year. How much did Jeff spend for clothing? (1)He spent $18 during the year on tennis balls. (2)He spent $190 during the year on recreation
单选题The school board has determined that it is necessary to reduce the number of teachers on the staff. Rather than deciding which teachers will be laid off on the basis of seniority, the school board plans to lay off the least effective teachers first.
The school board"s plan assumes that
单选题在假设检验中，原假设H0，备择假设H1，则称( )为犯第二类错误。 A．H0为真，接受H1 B．H0为真，拒绝H1 C．H0不真，接受H0 D．H0不真，拒绝H0
单选题抽样平均误差的实质是( )。 A．总体标准差 B．抽样总体的标准差 C．抽样误差的标准差 D．样本指标的标准差
单选题
单选题定基发展速度和环比发展的速度的关系是( )。 A．两个相邻时期的定基发展速度之商等于相应的环比发展速度 B．两个相邻时期的定基发展速度之差等于相应的环比发展速度 C．两个相邻时期的定基发展速度之和等于相应的环比发展速度 D．两个相邻时期的定基发展速度之积等于相应的环比发展速度
单选题统计平均数反映的是同质总体( )。 A．某一单位不同标志值的一般水平 B．某一单位某一数量标志的标志值的一般水平 C．各单位不同标志值的一般水平 D．各单位某一数量标志的标志值的一般水平
单选题If n is a prime number greater than 3, what is the remainder when n2 is divided by 12?
单选题An employee is paid 1.5 times the regular hourly rate for each hour worked in excess of 40 hours per week, excluding Sunday, and 2 times the regular hourly rate for each hour worked on Sunday. How much was the employee paid last week? (1)The employee's regular hourly rate is $10. (2)Last week the employee worked a total of 54 hours but did not work more than 8 hours on any day. (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Three stacks containing equal numbers of chips are to be made from 9 red chips, 7 blue chips，and 5 green chips．If all of these chips are used and each stack contains at least 1 chip of each color, what is the maximum number of red chips in any one stack? (A) 7 (B) 6 (C) 5 (D) 4 (E) 3
单选题InyearXatotalof355billiondollarswasspentforhealthcareintheUnitedStates,30percentofwhichwasspentbyprivatehealthinsurancecompanies.Wastheamountspentforhealthcarebythefederalgovernment'smedicareprogramlessthan60billiondollars?(1)InyearXmedicarespentmorethan,butlessthan,oftheamountspentbytheprivatehealthinsurancecompaniesforhealthcare.(2)InyearXmedicarespent50billiondollarslessforhealthcarethantheamountspentbyprivatehealthinsurancecompanies.
单选题
单选题If n is a positive integer, then n(n+1)(n+2) is (A) even only when n is even (B) even only when n is odd (C) odd whenever n is odd (D) divisible by 3 only when n is odd (E) divisible by 4 whenever n is even