概率论与数理统计ppt链接
http://e-learning.ecust.edu.cn/G2S/Template/View.aspx?courseId=26835&topMenuId=72352&action=view&type=&name=&menuType=1&curfolid=174706
http://e-learning.ecust.edu.cn/G2S/Template/View.aspx?courseId=26835&topMenuId=72352&action=view&type=&name=&menuType=1&curfolid=174706