东北林业大学
  1. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/0458d069b8f54c80a5acb9bd27cdadd4.png

  2. A:对 B:错
    答案:
  3. 设总体 ,其中 是未知参数, ,…, 是来自总体X的样本,样本均值为 利用一阶矩求出参数 的矩估计量是 .( )

  4. A:对 B:错
    答案:对
  5. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/d8361e4523114efc976b43066ddc88d3.png

  6. A:错 B:对
    答案:
  7. 两组二维数据的样本相关系数相等,说明这两组数据的相关程度相同。( )

  8. A:对 B:错
    答案:错
  9. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/c023c292fb924f98a8174ebf3685d1bc.png

  10. A:对 B:错
    答案:
  11. https://image.zhihuishu.com/zhs/question-import/formula/202311/e07ff316a6894bd9936e57d092924fa8.png

  12. A:错 B:对
    答案:
  13. 假设检验的拒绝域与显著性水平无关。( )

  14. A:对 B:错
    答案:错
  15. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/7943488fa09e41db9d176482d11a6530.png

  16. A:错 B:对
    答案:
  17. 对核动力工厂的某类仪器实施甲、乙两种不同的维修方案,现观测到两组失效时间(单位:小时)如下表所示:

    在显著性水平 下,能检验出这两种维修方案有一种方案显著地优于另一种方案。( )

  18. A:错 B:对
    答案:对
  19. 所有的非线性回归都可以线性化。( )

  20. A:对 B:错
  21. 是来自正态总体 的一个简单随机样本,则统计量 .( )

  22. A:错 B:对
  23. 某校在升学考试前对四个班级的数学进行了五次测验,以百分为满分,各班级平均分数如下表,

    问按5%的显著水平判断,得各班成绩无显著的差异.( )

  24. A:错 B:对
  25. 与样本容量无关的估计量可能是一致估计量。( )

  26. A:对 B:错
  27. 设总体 为服从 区间上的均匀分布,其中的 未知, 是来自这个总体的一组简单随机样本,则判定 是统计量。( )


  28. A:错 B:对
  29. 来自同一总体的顺序统计量相互独立,且与总体同分布。( )

  30. A:对 B:错
  31. 假设检验中的拒绝域由显著性水平、备择假设和检验统计量的分布决定。( )

  32. A:错 B:对
  33. 作为估计量,有偏估计量一定比无偏估计量不优。( )

  34. A:错 B:对
  35. 由三位教师对同一个班的作文试卷评分,分数记录如下,给定显著性水平 ,得三位教师给出的分数有显著性差异. ( )

  36. A:错 B:对
  37. 为比较两种枪弹的速度(单位: ,且服从正态分布),在相同条件下进行速度测定。算得样本均值和样本标准差如下:
    枪弹甲:
    枪弹乙:
    在显著性水平 下,甲种枪弹的速度较乙种枪弹速度快。( )

  38. A:错 B:对
  39. 设总体 服从这个 区间上的均匀分布,其中 未知, 是来自此总体的一组简单随机样本,则 是统计量。( )


  40. A:对 B:错
  41. 设 .w69992227344s .brush0 { fill: rgb(255,255,255); } .w69992227344s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227344s .font0 { font-size: 432px; font-family: Symbol, serif; } .w69992227344s .font1 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227344s .font2 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227344s .font3 { font-style: italic; font-size: 244px; font-family: "Times New Roman", serif; } .w69992227344s .font4 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227344s .font5 { font-size: 347px; font-family: Symbol, serif; } .w69992227344s .font6 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } ( ) 12 ,,, n XXX ××× 为总体 .w69992227323s .brush0 { fill: rgb(255,255,255); } .w69992227323s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227323s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227323s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227323s .font2 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } (0,1) N 的一个简单随机样本, .w69992227302s .brush0 { fill: rgb(255,255,255); } .w69992227302s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227302s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227302s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227302s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } X 是样本均值, .w69992227280s .brush0 { fill: rgb(255,255,255); } .w69992227280s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227280s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227280s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227280s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227280s .font2 { font-style: italic; font-size: 244px; font-family: "Times New Roman", serif; } .w69992227280s .font3 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227280s .font4 { font-size: 226px; font-family: Symbol, serif; } .w69992227280s .font5 { font-size: 347px; font-family: Symbol, serif; } .w69992227280s .font6 { font-size: 490px; font-family: Symbol, serif; } .w69992227280s .font7 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 22 1 1 () n i i SXX n = =- å , .w69992227258s .brush0 { fill: rgb(255,255,255); } .w69992227258s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227258s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227258s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227258s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227258s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227258s .font3 { font-size: 347px; font-family: Symbol, serif; } .w69992227258s .font4 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 2 2 1 1 TXS n =- - ,则 .w69992227238s .brush0 { fill: rgb(255,255,255); } .w69992227238s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227238s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227238s .font1 { font-size: 347px; font-family: Symbol, serif; } .w69992227238s .font2 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } DT = .w69992227218s .brush0 { fill: rgb(255,255,255); } .w69992227218s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227218s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w69992227218s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w69992227218s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w69992227218s .font2 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w69992227218s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 2 n .( )

  42. A:错 B:对
  43. 设 .w69992227495s .brush0 { fill: rgb(255,255,255); } .w69992227495s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227495s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w69992227495s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w69992227495s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w69992227495s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w69992227495s .font4 { font-size: 373px; font-family: Symbol, serif; } .w69992227495s .font5 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 12 (,,, ) n XXX ××× 来自总体 .w69992227474s .brush0 { fill: rgb(255,255,255); } .w69992227474s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227474s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227474s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227474s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227474s .font3 { font-style: italic; font-size: 347px; font-family: Symbol, serif; } .w69992227474s .font4 { font-size: 412px; font-family: "MT Extra", serif; } .w69992227474s .font5 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 2 11 (,) XN ms ~ , .w69992227453s .brush0 { fill: rgb(255,255,255); } .w69992227453s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227453s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w69992227453s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w69992227453s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w69992227453s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w69992227453s .font4 { font-size: 373px; font-family: Symbol, serif; } .w69992227453s .font5 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 12 (,,, ) m YYY ××× 来自总体 .w69992227430s .brush0 { fill: rgb(255,255,255); } .w69992227430s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227430s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227430s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227430s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227430s .font3 { font-style: italic; font-size: 347px; font-family: Symbol, serif; } .w69992227430s .font4 { font-size: 412px; font-family: "MT Extra", serif; } .w69992227430s .font5 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 2 22 (,) YN ms ~ ,且 .w69992227489s .brush0 { fill: rgb(255,255,255); } .w69992227489s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227489s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227489s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } X 与 .w69992227469s .brush0 { fill: rgb(255,255,255); } .w69992227469s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227469s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227469s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } Y 独立。 .w69992227447s .brush0 { fill: rgb(255,255,255); } .w69992227447s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227447s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227447s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227447s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } X 与 .w69992227423s .brush0 { fill: rgb(255,255,255); } .w69992227423s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227423s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227423s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227423s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } Y 分别是 .w69992227398s .brush0 { fill: rgb(255,255,255); } .w69992227398s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227398s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227398s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } X 与 .w69992227375s .brush0 { fill: rgb(255,255,255); } .w69992227375s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227375s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227375s .font1 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } Y 的样本均值, .w69992227351s .brush0 { fill: rgb(255,255,255); } .w69992227351s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227351s .pen1 { stroke: rgb(0,0,0); stroke-width: 17; stroke-linejoin: round; } .w69992227351s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227351s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227351s .font2 { font-style: italic; font-size: 244px; font-family: "Times New Roman", serif; } .w69992227351s .font3 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227351s .font4 { font-size: 226px; font-family: Symbol, serif; } .w69992227351s .font5 { font-size: 347px; font-family: Symbol, serif; } .w69992227351s .font6 { font-size: 490px; font-family: Symbol, serif; } .w69992227351s .font7 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 22 1 1 1 () n i i SXX n = =- å , .w69992227328s .brush0 { fill: rgb(255,255,255); } .w69992227328s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; 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stroke-width: 17; stroke-linejoin: round; } .w69992227308s .font0 { font-size: 244px; font-family: "Times New Roman", serif; } .w69992227308s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w69992227308s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w69992227308s .font3 { font-style: italic; font-size: 347px; font-family: Symbol, serif; } .w69992227308s .font4 { font-size: 347px; font-family: Symbol, serif; } .w69992227308s .font5 { font-size: 412px; font-family: "MT Extra", serif; } .w69992227308s .font6 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } 22 12 22 21 (1) (1) nmS mnS s s - - ~ .w69992227285s .brush0 { fill: rgb(255,255,255); } .w69992227285s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w69992227285s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w69992227285s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w69992227285s .font2 { font-size: 373px; font-family: Symbol, serif; } .w69992227285s .font3 { font-weight: bold; font-size: 80px; font-family: System, sans-serif; } (1,1) Fnm -- .( )

  44. A:对 B:错
  45. 甲乙两台机床,生产同一型号的滚珠,从甲乙两机床生产的滚珠中分别抽取8个与9个,测得数据如下(mm):
    甲:15.0 14.5 15.2 15.5 14.8 15.1 15.2 14.8
    乙:15.2 15.0 14.8 15.2 15.1 15.0 14.8 15.1 14.8
    假定滚珠直径服从正态分布,在显著性水平 下,可以认为两台机床产品的直径具有同一分布.( )

  46. A:错 B:对
  47. https://image.zhihuishu.com/zhs/question-import/formula/202311/4905297fcbb14aaeb51d62f6c88a80be.png

  48. A:对 B:错
  49. 请71人比较A、B两型电视机的画面好坏,认为A好者23人,认为B好者45人,拿不定主意者3人,则可以判定B的画面比A好。( )( )

  50. A:错 B:对
  51. 在化工生产中为了提高得率,选了三种不同浓度和四种不同温度情况做试验。其得率数据如下面的表所示(数据均已减去75):

    检验不同温度对得率有无显著影响的F检验统计量的值为( )。

  52. A:3.21 B:1.21 C:0.21 D:2.21
  53. 为总体X的一个样本, 为相应的样本观测值。
    总体X的概率密度为 ,则参数 的最大似然估计量是( )。

  54. A: B: C: D:
  55. https://image.zhihuishu.com/zhs/question-import/formula/202311/c173ae95b5df404a93a1a8a5af459129.png

  56. A: 的一致估计量 B: 的所有线性无偏估计中方差最小 C: 的最大似然估计量 D: 的矩估计量
  57. 考察合成纤维弹性,影响的因素为:收缩率A和总的拉伸倍数B。试验结果如下表所示:

    检验因素B对纤维弹性有无显著影响的F统计量的值为( )。

  58. A:4.1318 B:3.1318 C:2.1318 D:1.1318
  59. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/89b30371da5640468728321d6f31a97d.png

  60. A: B: C: D:
  61. https://image.zhihuishu.com/zhs/question-import/formula/202311/b1dd04552ec24acd8d0570fa6a17d7fa.png

  62. A:4.04 B:3.04 C:1.04 D:2.04
  63. 某合成纤维的强度与其拉伸倍数有一定关系。实测5个样品数据:

    则当 时, 的置信水平为0.95的置信区间是( )。

  64. A: B: C: D:
  65. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/f4d8bba2cfd3497b9f3c2a591896e3fe.png

  66. A:[43.96.44.93] B:[40.96.41.93] C:[41.96.42.93] D:[42.96.43.93]
  67. 某矿脉中13个相邻样本点处某种金属的含量 与样本点对原点的距离 有如下实测值:

    则用相关系数 判断得( )相关性最大。

  68. A: B: C: D:
  69. 设总体 的分布函数为

    其中 是参数, 为来自总体 的一个简单随机样本.则未知参数 的最大似然估计量是( )。

  70. A: B: C: D:
  71. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/c379ace74a544747864141f8c1ed364b.png

  72. A: B: C: D:
  73. 设总体 的分布函数为

    其中 是参数, 为来自总体 的一个简单随机样本.则未知参数 的矩估计量是( )。

  74. A: B: C: D:
  75. https://image.zhihuishu.com/zhs/question-import/formula/202311/9d67875258a748faad8c28b0691370f9.png

  76. A:5.23 B:4.23 C:3.23 D:2.23
  77. 对两批同类电子元件的电阻进行测试,各抽6件,测得结果如下(单位: ):
    A批:0.140,0.138,0.143,0.141,0.144,0.137;
    B批:0.135,0.140,0.142,0.136,0.138,0.141。
    已知元件的电阻服从正态分布,则两批电子元件电阻方差的检验统计量的值是( )。

  78. A:1.0495 B:3.0495 C:4.0495 D:2.0495
  79. 是来自正态总体 )的简单随机样本,则 服从的分布为( )。

  80. A: B: C: D:
  81. 设总体 ,在其他条件给定情况下,则 的置信区间长度 与置信度 的关系是( )。

  82. A: 减小时, 变小 B: 减小时, 增减不能确定 C: 减小时, 不变 D: 减小时, 增大
  83. 设总体 , 样本 来自 为样本均值. 则样本容量至少应取( )才能使

  84. A:1536 B:1535 C:1538 D:1537
  85. 总体 ,其中 未知, 为来自总体 样本,则下述统计量( )最好。

  86. A: B: C: D:
  87. 某种物品在处理前与处理后分别进行抽样,分析其含脂率如下:处理前:0.19,0.18,0.21,0.30,0.41,0.12,0.27;处理后:0.15,0.13,0.07,0.24,0.19,0.06,0.08,0.12;假定处理前后的含脂率都服从正态分布,则处理前后含脂率方差的检验统计量的值是( )。

  88. A:4.35 B:2.35 C:3.35 D:1.35
  89. 为总体 的样本, 已知,现对 进行假设检验。若在显著性水平 下拒绝了 ,则当 时,下列结论正确的是( )。

  90. A:必接受 B:第一类错误的概率变小 C:必拒绝 D:可能接受,也可能拒绝
  91. https://image.zhihuishu.com/zhs/onlineexam/ansewerImg/202311/3b797016eb8b4e2794c9d337349d3b37.png

  92. A: B: C: D:
  93. 合成纤维的强度 与其拉伸倍数 有关,测得实验数据如下,则 的回归直线方程是( )。

  94. A: B: C: D:
  95. 为了检验三年级小学生中男生与女生的身高是否有显著差异,从某小学三年级中随机抽查了7名男生和6名女生,测得他们的身高(单位:cm)为:男生:140, 138, 143, 142, 144, 137, 141女生:135, 140, 142, 136, 138, 140假设男生、女生的身高均服从方差相等的正态分布,且样本数据相互独立,则男生、女生身高平均值的检验统计量的值是( )。

  96. A:-0.52 B:-1.52 C:0.52 D:1.52
  97. 在硝酸钠(NaNO3)的溶解度试验中,测得在不同温度x(℃)下,溶解于100份水中的硝酸钠份数 的数据如下,

    则当 时, 的置信度为 的置信区间是( )。

  98. A: B: C: D:
  99. 考察合成纤维弹性,影响的因素为:收缩率A和总的拉伸倍数B。试验结果如下表所示:

    检验因素A对纤维弹性有无显著影响的F统计量的值为( )。

  100. A:17.5116 B:16.5116 C:18.5116 D:15.5116

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