【多选题】【消耗次数:1】
加权算术平均数的大小
受各组变量值大小的影响
受各组次数多少的影响
随X的增大而增大
随X的减少而减少E、与次数多少成反比关系
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相关题目
【多选题】 加权算术平均数的大小受哪些因素的影响( )。
①  受各组频率和频数的影响
②  受各组标志值大小的影响
③  受各组标志值和权数的共同影响
④  只受各组标志值大小的影响
⑤  只受权数的大小的影响
【多选题】 加权算术平均数的大小受哪些因素的影响( )
①  受各组频率和频数的影响
②  受各组标志值大小的影响
③  受各组标志值和权数的共同影响
④  只受各组标志值大小的影响
⑤  只受权数的大小的影响
【多选题】 加权算术平均数的大小受哪些因素的影响
①  受各组频数或频率的影响
②  受各组标志值大小的影响
③  受各组标志值和权数的共同影响
④  只受各组标志值大小的影响
⑤  只受权数大小的影响
【判断题】 判断对错:加权算术平均数的大小受两个因素的影响,一是受变量值大小的影响,二是受权数的影响。( )
①  正确
②  错误
【单选题】 加权算术平均数的大小不受哪些因素的影响( )。
①  受各组频率和频数的影响
②  受各组标志值大小的影响
③  受各组标志值和权数的共同影响
④  只受各组标志值大小的影响
【判断题】 权数对算数平均数的影响作用只表现为各组出现次数的多少,与各组次数占总次数的比重无关。
①  正确
②  错误
【判断题】 算术平均数的大小,只受总体各单位标志值大小的影响。
①  正确
②  错误
【判断题】 算术平均数易受极大值影响,而调和平均数易受极小值影响。
①  正确
②  错误
【单选题】 在加权算术平均数中,如果各个变量值都扩大3倍,而频数都减少为原来的三分之一,则平均数
①  不变
②  减少了
③  扩大3倍
④  不能确定
【单选题】 加权算术平均数的大小,以下说法哪一项正确?
①  仅受变量值大小影响
②  仅受各组次数影响
③  受变量位及次数两者共同影响
④  不受变量值及次数影响
随机题目
【单选题】 Who exerts the single most important influence on literary naturalism, of which Theodore Dreiser and Jack London are among the best representative writers?
①  Freud
②  Darwin
③  W. D. Howells
④  Emerson
【单选题】 _____ had an evident influence on naturalism. It seemed to stress the animality of man, to suggest that he was dominated by the irresistible forces of evolution.
①  Transcendentalism
②  Darwinism
③  Marxism
④  Freudianism
【单选题】 As a realist, Mark Twain concerned particularly about the local character of a region, which came about as “_________”.
①  Naturalism
②  Transcendentalism
③  Local Colorism
④  Both A and C
【单选题】 ______ is not the representative writer in the Age of Realism in the literary history of the United States.
①  Henry James
②  Ezra Pound
③  William Dean Howells
④  Mark Twain
【单选题】 Which of the following is not right about Mark Twain’s writing style?
①  ungrammatical and complicated
②  colloquial and concrete
③  remarkable humor
④  deep influence on contemporary writers
【单选题】 After the Civil War America was transformed from ______ to ______.
①  an agrarian community … an industrialized and commercialized society
②  an agrarian community … a society of freedom and equality
③  a poor and backward society … an industrialized and commercialized society
④  an industrialized and commercialized society … a highly developed society
【单选题】 Which of the following is NOT right about Mark Twains style of language?
①  His sentence structures are long, ungrammatical and difficult to read.
②  His words are colloquial, concrete and direct in effect.
③  His humor is remarkable and characterized by puns, straight-faced exaggeration, repetition and anti-climax.
④  His style of language had exerted rather deep influence on the contemporary writers.
【判断题】 The Transcendentalist group includes two of the most significant writers America has produced so far, Emerson and Henry David Thoreau.
①  正确
②  错误
【判断题】 At the Reason and Revolution Period, Americans were influenced by the European movement called Romanticism Movement.
①  正确
②  错误
【判断题】 In the novel Moby Dick, the rebellious struggle of Captain Ahab was thought to be against the white whale.
①  正确
②  错误