伯努利分布
伯努利分布（the Bernoulli distribution，又名两点分布或者0-1分布，是一个离散型概率分布，为纪念瑞士科学家雅各布·伯努利而命名。)若伯努利试验成功，则伯努利随机变量取值为1。若伯努利试验失败，则伯努利随机变量取值为0。记其成功概率为![](https://wkrtcs.bdimg.com/rtcs/image?w=85.00&md5sum=3bee905250c727a218541562816c4f98&sign=869b032cc4&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=99&ipr={"t":"img","r":"r_6","w":"85.00","h":"21.00","dataType":"png","c":"word/media/image1.png","imgOriW":85,"imgOriH":21})
，失败概率为。则
∙ 其概率质量函数为： ![](https://wkrtcs.bdimg.com/rtcs/image?w=411.00&md5sum=3bee905250c727a218541562816c4f98&sign=869b032cc4&rtcs_flag=1&rtcs_ver=4&l=webapp&bucketNum=99&ipr={"t":"img","r":"r_8","w":"411.00","h":"71.00","dataType":"png","c":"word/media/image3.png","imgOriW":411,"imgOriH":71})
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