Chapter 349 (2/2)

Cheng Nuo looked around, then said with a smile, ”I am very honored to be Professor Fang's teaching assistant. To tell you the truth, when I first received this task, I was very frightened.”

”After all, my age is young in this position. After all, I'm not a few years older than everyone else.”

What does it mean to be a few years older?

Are you a year younger than us?

I've seen those who pretend to be young, but I haven't seen those who pretend to be old!!

make complaints about the students who know the roots of Cheng Nuo.

”But!” Cheng Nuo continued, ”when I learned that the job of teaching assistants is linked to personal academic level, so I naturally stand here.”

All of them said, ”well

This time, not only the group of people who knew Cheng Nuo's deeds, but also the students who didn't know Cheng Nuo felt that this guy Good to pretend!

Due to the limitation of class time, Cheng Nuo didn't publish some lengthy things like the speech of award-winning.

After saying something casually, Cheng Nuo finally cheered on the students.

”In short, I hope we can work together and make progress together in the next three months.”

”I don't want you to be the worst student I've ever had!”

All of them said, ”well

Speechless + 2!

Finally, in the eagerness of the students, Cheng Nuo walked off the platform after the speech, and almost one of the students was still in a confused state.

Indeed, this lecture speed, even for Tsinghua students, is also forced to obey!

Say rbq，rbq！

”Next, let teacher Cheng give you an example to understand the content of this lesson, and by the way, arrange a few in class exercises as a test for learning Cheng Nuo.”With that, Professor Fang unscrewed the lid of the thermos cup, smacked the medlar water fiercely, and walked leisurely toward the door.

Cheng Nuo just went to the podium and opened another PPT in the folder.

Here are some examples and exercises.

Cheng Nuo sent it to Professor Fang, but he didn't read it in advance. In his words, if such a basic topic is not good, then we should consider whether we should delay graduation for one year.

”Let's first look at an example of the combination of order statistics and order statistics sum, example 1, x1 Xn is a sample from a population whose distribution function is f (x), its density function is p (x), and its order statistic is x (1) ≤ X (n), their observed values are Y1 ≤ If the density function g (YK) of ≤ y (n), X (k), then... ”

As a teaching assistant, Cheng Nuo is quite responsible.

Originally, he was only responsible for speaking. As for whether the students understood or not, it was their own business.

However, he is a little better. At least in some places that students think are difficult to understand, he repeatedly talks several times. Considering the progress of the course, he can only rely on their own efforts after class.

As for the classroom exercises, Cheng Nuo did not deliberately go out of what tricky topics.

Are based on the previous year's examination questions for a certain degree of adaptation.

At most, it's a little more difficult.

For example, let the density function of random variables (x, y) be: δ (x, y) = 14, y < x, 0 < x < 2; δ (x, y) = 0

question (1): calculate the marginal density functions δ x (x), δ y (y).

(2) whether X and y are independent? Is it relevant?

(3) Calculate z = 】

………………