【简答题】Many people like travelling for their holiday. They go to ___1___, seaside or forests. Some people like ___2___, so they like to visit some old interesting places. In many countries, the travel agency...
【简答题】以下哪些关于连续型随机变量及其概率分布的陈述是正确的:
I. 概率分布可以由一个概率密度函数来描述
II. 一个事件E发生的概率可以由P(X=E)来计算
III. 概率曲线下的面积总和为1A. 只有I正确 B. 只有I和II正确 C. 只有I和III正确 D. 只有II正确 E. 只有III正确