1. 答案:

  2. 答案:对
  3. 对单个正态总体的方差进行检验时,若总体均值未知,则使用F检验法。( )

  4. 答案:错

  5. 答案:对
  6. 对两个正态总体的均值差进行检验时,若两个总体的方差均未知并且相等,则使用t检验法。( )

  7. 答案:对

  8. 答案:

  9. 答案:5/12

  10. 答案:
  11. 设事件A与B独立, 则下面的说法中错误的是( ).

  12. 答案:A与B一定互斥.
  13. 设随机变量X的分布函数为F(x)=A+Barctan x,则A,B= ( )

  14. 答案:

  15. 答案:
  16. 设A,B,C为三个事件,试用A,B,C的运算关系表示事件:A,B,,C中多于一个发生( )
  17. 甲、乙、丙三人同时对某飞机进行射击, 三人击中的概率分别为0.4, 0.5, 0.7. 飞机被一人击中而被击落的概率为0.2, 被两人击中而被击落的概率为0.6, 若三人都击中, 飞机必定被击落. 求该飞机被击落的概率.( )
  18. 在假设检验中,犯第一类错误的概率为( )。
  19. 设随机变量X,Y独立同分布且X的分布函数为F(x),则Z=min{x,y)的分布函数为( )
  20. 某一地区患有癌症的人占0.005,患者对一种试验反应是阳性的概率为0.95,正常人对这种试验反应是阳性的概率为0.04,现抽查了一个人,试验反应是阳性,问此人是癌症患者的概率有多大?( )
  21. 设容量n = 10 的样本的观察值为(8,7,6,9,8,7,5,9,6),则样本均值和样本方差分别是( ).
  22. 连续型随机变量的分布函数的导数等于其概率密度函数。( )
  23. 连续型随机变量取任一指定值的概率为0。( )
  24. 设E(X)=2,E(Y)=4,D(X)=4 ,D(Y)=9,X与Y的相关系数为-0.5,则以下结论正确的有( )。
  25. 对单个正态总体的均值进行检验时,若总体方差已知,则使用Z检验法。( )
  26. 设(X, Y)服从二元正态分布, 则下列结论中错误的是( )。
  27. 设X~N(-1,2),Y~N(1,3),且X与Y相互独立,则X+2Y~( )
  28. 在下列结论中, 错误的是( ).
  29. 假设随机变量X与Y相互独立且都服从参数为λ的指数分布,则可以做出服从参数为2λ的指数分布的随机变量如( )
  30. 样本容量固定时,犯第一类错误的概率越大, 则犯第二类错误的概率越小。( )
  31. 犯第一类错误的概率越大, 则右侧检验的临界值越小。( )
  32. 正态分布的线性函数仍然服从正态分布。( )
  33. 若随机变量X在区间(a,b)上服从均匀分布,则X落入任何子区间的概率仅与该区间的长度成正比,而与其位置无关。( )
  34. 假设检验易犯的第二类错误也称为取伪错误。( )
  35. 设A,B,C为三个事件,试用A,B,C的运算关系表示事件:A,B,C不都发生( )
  36. 设随机变量X与Y都服从标准正态分布,则( )
  37. 设G是由直线y=x,y=3,x=1所围成的三角形区域,二维随机变量(X,Y)在G上服从二维均匀分布,则P{Y-X≤1}=( )
  38. 设人群中感冒的比例为p,在有10人的聚会中存在感冒病毒的概率为( ).
  39. 在三次独立重复试验中,成功的概率相同,已知至少成功一次的概率为19/27则每次试验成功的概率P=( )
  40. 设随机变量XY独立同分布,且X的分布函数为F(x),则 Z=max{X,Y}的分布函数为( )
  41. 设A,B,C是两两独立且不能同时发生的随机事件,且P(A)=P(B)=P(C)=x,则x的最大值为( )
  42. 设总体X的均值μ与方差σ2都存在但未知,而X1,X2,…,Xn为来自X的样本,则均值μ与方差σ2的无偏估计量分别是( ) 。
  43. 若X服从参数为λ的泊松分布,且P{X=1}=P{X=3},则 λ= ( )
  44. 设X为连续型随机变量,则X的分布函数是( ).
  45. 以A表示事件“甲种产品畅销,乙种产品滞销”,则其对立事件Ā为( ).
  46. 设随机变量X在区间[2,4]上服从均匀分布,则P{2
  47. 设X服从二项分布b(n,p),其方差与数学期望之比为3:4,则参数P等于( )。
  48. 设随机变量X的期望与方差分别为11和4,根据切比雪夫不等式估计随机变量X落在(2,20)内的概率不小于( ).
  49. 一批产品由95件正品和5件次品组成, 先后从中抽取两件, 第一次取出后不再放回.求: 第一次抽得正品且第二次抽得次品的概率( )
  50. 在假设检验中,犯第二类错误的概率为( )。
  51. 假设检验的基本原理是实际推断原理。( )
  52. 假设检验易犯的第一类错误也称为弃真错误。( )
  53. 假设检验时,若增大样本容量,则犯两类错误的概率( )。
  54. 在假设检验中,显著性水平表示( )。
  55. 对单个正态总体的均值进行检验时,使用的是t检验法。( )
  56. 设总体 .w64975585016s .brush0 { fill: rgb(255,255,255); } .w64975585016s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585016s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975585016s .font1 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } X 的均值为0, 方差 .w64975584997s .brush0 { fill: rgb(255,255,255); } .w64975584997s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584997s .font0 { font-size: 231px; font-family: "Times New Roman", serif; } .w64975584997s .font1 { font-style: italic; font-size: 347px; font-family: Symbol, serif; } .w64975584997s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 s 存在但未知, 又 .w64975584982s .brush0 { fill: rgb(255,255,255); } .w64975584982s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584982s .font0 { font-size: 231px; font-family: "Times New Roman", serif; } .w64975584982s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584982s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584982s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 12 , XX 为来自总体 .w64975584973s .brush0 { fill: rgb(255,255,255); } .w64975584973s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584973s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584973s .font1 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } X 的样本, .w64975584960s .brush0 { fill: rgb(255,255,255); } .w64975584960s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584960s .font0 { font-size: 231px; font-family: "Times New Roman", serif; } .w64975584960s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584960s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584960s .font3 { font-size: 347px; font-family: Symbol, serif; } .w64975584960s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 12 () kXX - 为 .w64975584941s .brush0 { fill: rgb(255,255,255); } .w64975584941s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584941s .font0 { font-size: 231px; font-family: "Times New Roman", serif; } .w64975584941s .font1 { font-style: italic; font-size: 347px; font-family: Symbol, serif; } .w64975584941s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 s 的无偏估计. 则常数 .w64975585019s .brush0 { fill: rgb(255,255,255); } .w64975585019s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585019s .font0 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585019s .font1 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } k = ( ) .
  57. 下面哪个不是估计量的评判标准 ( ).
  58. 已知一批零件的长度X(单位:cm)服从正态分布 .w64975585003s .brush0 { fill: rgb(255,255,255); } .w64975585003s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585003s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975585003s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585003s .font2 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975585003s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } (,1) N m ,从中随机地抽取16个零件,得到长度的平均值为40cm,则μ的置信水平为0.95的置信区间是 ( ). 。{(39.51,40.49)}
  59. 设总体X的概率密度为 .w64975585000s .brush0 { fill: rgb(255,255,255); } .w64975585000s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585000s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975585000s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975585000s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975585000s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585000s .font4 { font-style: italic; font-size: 241px; font-family: Symbol, serif; } .w64975585000s .font5 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975585000s .font6 { font-size: 241px; font-family: Symbol, serif; } .w64975585000s .font7 { font-size: 373px; font-family: Symbol, serif; } .w64975585000s .font8 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } () , (,) 0, x ex fx x q q q q -- ì ³ = í < î ,而 .w64975584983s .brush0 { fill: rgb(255,255,255); } .w64975584983s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584983s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975584983s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975584983s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975584983s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584983s .font4 { font-size: 444px; font-family: "MT Extra", serif; } .w64975584983s .font5 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 12 ,,, n XXX L 是来自总体X的样本,则未知参数θ的矩估计量为 ( ).
  60. 设 .w64975584945s .brush0 { fill: rgb(255,255,255); } .w64975584945s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584945s .font0 { font-size: 444px; font-family: "MT Extra", serif; } .w64975584945s .font1 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975584945s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } $ q 是未知参数θ的最大似然估计量,则 .w64975585024s .brush0 { fill: rgb(255,255,255); } .w64975585024s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585024s .font0 { font-size: 444px; font-family: "MT Extra", serif; } .w64975585024s .font1 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975585024s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } $ q ( ).
  61. 设随机变量 .w64975584977s .brush0 { fill: rgb(255,255,255); } .w64975584977s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584977s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w64975584977s .font0 { font-size: 231px; font-family: "Times New Roman", serif; } .w64975584977s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584977s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584977s .font3 { font-size: 347px; font-family: Symbol, serif; } .w64975584977s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 1 ~()(1), XtnnY X >= , 则下列关系中正确的是( ).
  62. 设 .w64975584989s .brush0 { fill: rgb(255,255,255); } .w64975584989s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584989s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975584989s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975584989s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975584989s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584989s .font4 { font-size: 444px; font-family: "MT Extra", serif; } .w64975584989s .font5 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 12 ,,, n XXX L 是来自总体 .w64975584943s .brush0 { fill: rgb(255,255,255); } .w64975584943s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584943s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584943s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975584943s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584943s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584943s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ~ (1,) X Bp 的样本,则 .w64975585020s .brush0 { fill: rgb(255,255,255); } .w64975585020s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585020s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975585020s .font1 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975585020s .font2 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585020s .font3 { font-size: 241px; font-family: Symbol, serif; } .w64975585020s .font4 { font-size: 530px; font-family: Symbol, serif; } .w64975585020s .font5 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 1 n i i X = å 的分布为 ( ).
  63. 设 .w64975584964s .brush0 { fill: rgb(255,255,255); } .w64975584964s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584964s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975584964s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975584964s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975584964s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584964s .font4 { font-size: 444px; font-family: "MT Extra", serif; } .w64975584964s .font5 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 12 ,,, n XXX L 是来自正态总体 .w64975584946s .brush0 { fill: rgb(255,255,255); } .w64975584946s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584946s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975584946s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584946s .font2 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975584946s .font3 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584946s .font4 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584946s .font5 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975584946s .font6 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 ~ (,) X N ms 的样本, .w64975585023s .brush0 { fill: rgb(255,255,255); } .w64975585023s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585023s .font0 { font-size: 470px; font-family: Symbol, serif; } .w64975585023s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w64975585023s .font1 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975585023s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975585023s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585023s .font4 { font-size: 347px; font-family: Symbol, serif; } .w64975585023s .font5 { font-size: 373px; font-family: Symbol, serif; } .w64975585023s .font6 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ( ) ( ) 2 12 2 34 Y XX XX = - - 的分布为 ( ).
  64. 设 .w64975585028s .brush0 { fill: rgb(255,255,255); } .w64975585028s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585028s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975585028s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w64975585028s .font2 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975585028s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975585028s .font4 { font-size: 444px; font-family: "MT Extra", serif; } .w64975585028s .font5 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 12 ,,, n XXX L 是来自总体X的样本,总体X的均值μ已知,方差 .w64975585009s .brush0 { fill: rgb(255,255,255); } .w64975585009s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585009s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975585009s .font1 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975585009s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 s 未知,则 .w64975584990s .brush0 { fill: rgb(255,255,255); } .w64975584990s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584990s .pen1 { stroke: rgb(0,0,0); stroke-width: 19; stroke-linejoin: round; } .w64975584990s .font0 { font-size: 260px; font-family: "Times New Roman", serif; } .w64975584990s .font1 { font-style: italic; font-size: 260px; font-family: "Times New Roman", serif; } .w64975584990s .font2 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w64975584990s .font3 { font-style: italic; font-size: 373px; font-family: Symbol, serif; } .w64975584990s .font4 { font-size: 241px; font-family: Symbol, serif; } .w64975584990s .font5 { font-size: 373px; font-family: Symbol, serif; } .w64975584990s .font6 { font-size: 530px; font-family: Symbol, serif; } .w64975584990s .font7 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 1 n i i X m s = - å 是统计量。( )
  65. 设X为随机变量,EX=0.1,DX=0.01,则由切比雪夫不等式可得=( )。
  66. 设随机变量X的数学期望为1,方差为0.3,则随机变量X落入区间(0,2)的概率 不小于1。( )
  67. 设随机变量X与Y不相关,且E(X)=2,E(Y)=1,D(X)=3,则E[X(X+Y-2)]=( )。
  68. 设X与Y相互独立,且都服从N(1,4)分布, 则有( )。
  69. 设随机变量X的数学期望为1,方差为0.5,则随机变量X落入区间(0,2)的概率 不小于0.5。( )
  70. 已知随机变量X服从参数为n,p的二项分布b(n,p),且E(X)=2.4,D(X)=1.44,则参数n,p的值是( )。
  71. 在以下结论中,是随机变量X与Y不相关的充要条件的是( )。
  72. 设随机变量(x,y)的分布函数为f(x,y),则概率p{x>a,y>b}=( )
  73. 下列各函数中是随机变量分布函数的为( )
  74. 设二维随机变量(X,Y)的概率密度为f(x,y),则{x>1}=( )
  75. 设X的分布函数为F(x), 则 .w64975584947s .brush0 { fill: rgb(255,255,255); } .w64975584947s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584947s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584947s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584947s .font2 { font-size: 347px; font-family: Symbol, serif; } .w64975584947s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 31 YX =+ 的分布函数 .w64975585022s .brush0 { fill: rgb(255,255,255); } .w64975585022s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585022s .font0 { font-size: 441px; font-family: Symbol, serif; } .w64975585022s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975585022s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ( ) Gy 为( ).
  76. 设 .w64975584970s .brush0 { fill: rgb(255,255,255); } .w64975584970s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584970s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584970s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584970s .font2 { font-size: 347px; font-family: Symbol, serif; } .w64975584970s .font3 { font-size: 373px; font-family: Symbol, serif; } .w64975584970s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2, [0,], () 0, [0,]. xxc fx xc Î = Ï ì í î 如果c=( ), 则 .w64975584957s .brush0 { fill: rgb(255,255,255); } .w64975584957s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584957s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584957s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584957s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } () fx 是某一随机变量的概率密度函数.
  77. 下列函数中可以作为某一随机变量的概率密度的是( ).
  78. 设 .w64975584949s .brush0 { fill: rgb(255,255,255); } .w64975584949s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584949s .font0 { font-size: 441px; font-family: Symbol, serif; } .w64975584949s .font1 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975584949s .font2 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584949s .font3 { font-size: 347px; font-family: Symbol, serif; } .w64975584949s .font4 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ( ) ~01, XN , 令 .w64975585026s .brush0 { fill: rgb(255,255,255); } .w64975585026s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585026s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975585026s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975585026s .font2 { font-size: 347px; font-family: Symbol, serif; } .w64975585026s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 2 YX =-- , 则 .w64975585007s .brush0 { fill: rgb(255,255,255); } .w64975585007s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975585007s .font0 { font-size: 377px; font-family: "Times New Roman", serif; } .w64975585007s .font1 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975585007s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ~ Y ( ).
  79. 设随机事件A与B互不相容, 且有P(A)>0, P(B)>0, 则下列关系成立的是( ).
  80. 随机事件A与B互不相容,且P(A)>P(B)>0,则( ).
  81. 设随机事件A,B满足关系 .w64975584953s .brush0 { fill: rgb(255,255,255); } .w64975584953s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w64975584953s .font0 { font-style: italic; font-size: 377px; font-family: "Times New Roman", serif; } .w64975584953s .font1 { font-size: 347px; font-family: Symbol, serif; } .w64975584953s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } AB É ,则下列表述正确的是( ).
  82. 设A,B为任意两个事件,则下列关系式成立的是( ).
  83. 设随机事件A, B满足P(A|B)=1, 则下列结论正确的是( ).
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