问答题

听课内容的总结与个人心得，以思维导图的形式呈现。

答案：由于我无法直接创建视觉图像或思维导图，我将提供一个结构化的文本格式，你可以根据这个结构来创建自己的思维导图。1. 核心主...

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单项选择题

Speaking practice: Read and choose the best answers to complete the dialogues. A: Excuse me. Do you happen to know if there is a post office near here? B: Just a minute. Let me see. The nearest post office is on East Road. A: _____________? B: Yes. You go straight on till the zebra cross. Then turn left there. You’ll see the post office across the road. A: Go straight and turn left? B: That’s right. A: Thank you so much! B: My pleasure.
A、Is the post office far away from here
B、Is it possible to walk there
C、Should I take a bus to get there
D、Can you take me to the post office

已知X与Y的边际分布律，则必能确定（X,Y）的联合分布律.

答案：已知X与Y的边际分布律，并不能保证一定能确定（X,Y）的联合分布律。边际分布律指的是在多变量概率分布中，单个变量的分布情...