已选分类
管理学工商管理
单选题Are all of the numbers in a certain list of 15 numbers equal? (1)The sum of all of the numbers in the list is 60. (2)The sum of any 3 numbers in the list is 12。
单选题在全国人口普查中( )。 A．男性是品质标志 B．人的年龄是变量 C．人口的平均寿命是数量标志 D．全国的人口是统计指标
单选题If x, y and z are non-zero numbers such that 1≥y＞x and xy=z, which of the following cannot be true?
单选题在大多数情况下，不是影响战略计划系统设计的主要因素是：
单选题
单选题If S is an infinite set of real numbers, is there a number in S that is less than every other number in S? (1)Every number in S is an integer. (2)Every number in S is positive.
单选题在同样条件下，不重复抽样的抽样平均误差与重复抽样的抽样平均误差相比( )。 A．前者大于后者 B．前者小于后者 C．两者相等 D．无法判断
单选题随机试验所有可能出现的结果，称为( )。 A．样本 B．样本空间 C．基本事件 D．全部事件
单选题There are between 100 and 110 cards in a collection of cards. If they are counted out 3 at a tie, there are 2 left over, but if they are counted out 4 at a time, there is 1 left over. How many cards are in the collection? (A) 101 (B) 103 (C) 106 (D) 107 (E) 109
单选题Iftaxifareswere$1.00forthefistmileand$0.20foreachmilethereafter,thenthetaxifarefora3-mileridewas
单选题
甲的下列行为构成侵犯商业秘密（ ）。
A、将自己偶然拾得的乙的设计图纸自己使用
B、将自己偶然拾得的乙的设计图氏有偿提供给丙使用，乙并不知晓
C、经乙的授权使用乙的商业秘密，但自己又自作主张无偿提供给丙使用
D、擅自使用乙的专利技术
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.
单选题若因变量是定性变量并用比率表示，适合采用( )。 A．直线回归 B．一元回归 C．多元回归 D．逻辑回归
单选题While driving Oil the expressway, did Robin ever exceed the 55-miles-per-hour speed limit? (1)Robin drove 100 miles on the expressway. (2)Robin drove for 2 hours on the expressway. (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．
单选题要检验总体是否服从正态分布，可采用的统计检验方法是( )。 A．F检验 B．t检验 C．r2检验 D．正态检验
单选题The market value of a certain machine decreased by 30 percent of its purchase price each year. If the machine was purchased in 1982 for its market value of $8,000, what was its market value two years later?
单选题为了了解某商业企业的期末库存量，调查人员亲自盘点库存，这种方法是( )。 A．大量观察法 B．采访法 C．直接观察法 D．报告法
单选题相关系数r的取值范围( )。 A．-∞＜r＜+∞ B．-1≤r≤1 C．-1＜r＜1 D．0≤r≤1
单选题优先段因为有固定的股利又无到期日，因而优先股利可以看作：
单选题某厂家声称某产品的平均使用寿命不低于2000小时，应该建立： A．双侧假设 B．左侧备择假设 C．右侧备择假设 D．单侧假设