一电话总机每分钟收到呼唤的次数服从参数 为 [tex=0.429x1.214]hmpZdQ5X/ovUwx7Kp6kRnQ==[/tex]的泊松分布, 则某一分钟的呼叫次数大于 [tex=0.429x1.214]VhNdWdSu7+dI2/cHC+GWyg==[/tex] 的概率为 ().
未知类型:{'options': ['[tex=4.571x2.357]mIs7WFqmlVG37xGJfKx2BHK5zpL2R1R00OjqPw9M8ZA=[/tex]', '[tex=4.571x2.357]0f+OqpYZdhQeoTnxTwWfxfPMkrS9TDLujgZ8g60IxQo=[/tex]', '[tex=4.286x2.357]mIs7WFqmlVG37xGJfKx2BOCnwySjE949lh/KTR732lY=[/tex]', '[tex=4.286x2.357]0f+OqpYZdhQeoTnxTwWfxb/YGWvP6yA9HKSwxUE4RX4=[/tex]'], 'type': 102}
未知类型:{'options': ['[tex=4.571x2.357]mIs7WFqmlVG37xGJfKx2BHK5zpL2R1R00OjqPw9M8ZA=[/tex]', '[tex=4.571x2.357]0f+OqpYZdhQeoTnxTwWfxfPMkrS9TDLujgZ8g60IxQo=[/tex]', '[tex=4.286x2.357]mIs7WFqmlVG37xGJfKx2BOCnwySjE949lh/KTR732lY=[/tex]', '[tex=4.286x2.357]0f+OqpYZdhQeoTnxTwWfxb/YGWvP6yA9HKSwxUE4RX4=[/tex]'], 'type': 102}
举一反三
- 已知离散型随机变量X服从参数为[tex=2.357x1.286]9cZIdkRT3EAhjVQWRXyVbQ==[/tex]的泊松分布,则概率[tex=4.357x1.286]zJ99eKRPURUMprGg87/XCA==[/tex]为 未知类型:{'options': ['[tex=1.714x2.357]7tlRJbwmcXZK7r91kOSLJYZgUCm79iTab4RiK9z0T+E=[/tex]', '[tex=1.714x2.357]NKsUxeB8RsIWJIL4HJ9xlhHbpNo+tY9ZPyanHvVsD0Q=[/tex]', '[tex=1.643x2.357]KN/uyQRU+Nbd4ps+Dr1dQi6rJNKmm8u3KXappsWN2nE=[/tex]', '[tex=1.643x2.357]gWroLk4VVMj4anaNXaZSdXeNNOibbwUl02kGqsfg2vA=[/tex]'], 'type': 102}
- 随机变量X服从参数为[tex=0.643x1.0]7dwHQGHL24uGORI8NryViw==[/tex]的泊松分布,且已知[tex=8.571x1.357]gWyoTuxxsfaBqL4MAoQPzg==[/tex],则[tex=0.643x1.0]7dwHQGHL24uGORI8NryViw==[/tex]=[input=type:blank,size:4][/input].
- 假设所有变量均为整型, 则表达式[tex=10.571x1.357]LwbIklUNi3bG92VfuhR/2s2h8bPim4KlwMHG5pBJ+3PKMuWS/4OGtcmSMjC2vxzVyrIKC8OVgBRFsqcS0s1A1u2X9g+VlWD58VLIpTfy7/0=[/tex]后[tex=0.571x0.786]FLCxr+5eRIYnIT0kyTRrXg==[/tex]的值为 未知类型:{'options': ['7', '8', '6', '2'], 'type': 102}
- 证明:次数大于0的首一多项式[tex=1.857x1.357]BGkv0wKMIn2R4tUsMDFEFA==[/tex]是某一不可约多项式的方幂的充分必要条件是,对任意的多项式[tex=1.857x1.357]QPi3lZKJ+q/B5QY5cuDuQg==[/tex]或者有(f(x), g(x))=1[tex=6.786x1.357]LBShIAKXyumE73h8+CWE0g==[/tex],或者对某一正整数[tex=0.929x0.786]D9maNLyVVGrC3QbL9jjRWg==[/tex],[tex=5.214x1.357]2b+0ZPIn+JhnqeNAq++wBM+CF08EAq9ClmGz91b+CDs=[/tex].
- 有容量分别为[tex=3.286x1.286]pCZ+fPe3X5XtlIcXCf6RGw==[/tex]和[tex=3.286x1.286]JjWMjbwalVPPThZBywJsLQ==[/tex]的独立随机样本得到下述观测结果, (X、 Y为观测值, f为频数)X 12.3 12.5 12.8 13.0 13.5 Y 12.2 12.3 13.0f 1 2 4 2 1 f 6 8 2现已知变量X、Y的总体均呈正态分布。请问在0.05的显著性水平下,可否认为这两个总体属同一分布?[tex=24.786x1.286]OVWwFMgiPzBDnRSqBYypUv4puOxaqZVbzeGoYhEt/ZwiQxP0kGgAAWuaJInyBhH09xLkSWqB6n3qd1WXaKpfvwUNfmmVSMJTzi4wz4IT6q4=[/tex][tex=8.429x1.286]AcUD6cTXhAghaQMem3GRbFMfFVpZHcyA3tP0z+S7RAk=[/tex] [tex=13.357x1.357]ZPe8nXNlBeMmW2cEA+D6DaqP/loFbcVH2QukDH1SMofLM6E74nDyl0WrH8imm/Ai[/tex]