【单选题】两组样本 ( 计量资料 ) 比较,用秩和检验的条件为 。
【单选题】If you were a government official and wanted to raise the price of oil, which of the following actions would you take?
A.
Take oil from government storage and sell it on the open market.
B.
Encourage producers to drill more wells.
C.
Try to lower the price of alternative fuels.
D.
Encourage producers to cut back on drilling for oil.
【判断题】操作系统是计算机硬件和计算机软件之间的接口。
【单选题】完全随机设计两样本均数比较时,若各组样本含量均小于30,资料方差不齐且极度偏态,宜采用()比较
【判断题】操作系统是计算机硬件和计算机软件之间的接口。
【简答题】操作系统是用于管理和控制计算机硬件和软件资源的一组程序,即操作系统也是一种软件;它是 和 之间的接口;也是 和计算机之间的接口。
【单选题】If the price of oil, a close substitute for coal, increases, then
A.
the supply curve for coal will shift to the right.
B.
the demand curve for coal will shift to the right.
C.
the equilibrium price and quantity of coal will not change.
D.
the quantity of coal demanded will decline.
【单选题】If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.
【简答题】If the war ____ (not break) out, the price of oil wouldn’t have been so high.
【多选题】成组设计两样本比较的秩和检验可用于以下哪些情况