Dreaming can be a boss

Ning Shiyuan glanced at it and confirmed that the answer was correct. She was sincerely convinced in her heart that she deserved to be a big brother with full grades. She really previewed it in advance...

If she had had this kind of motivation when she was in college, she probably wouldn't have come to Shanghai to study as a graduate student.

But to put it another way, if she didn't come here to study, she wouldn't have met Su Lu.

"My brother is really good, my sister will give you a lunch." She patted Su Lu's shoulder and said grandly.

Su Lu chuckled.

At this time, Professor Zhang on the podium was not in a hurry, drinking tea, waiting slowly, his eyes sometimes caught Su Lu and Ning Shiyuan whispering all the time, not listening at all, so he didn't know whether to call their names or pretend did not see it.

After 2 minutes, it is obvious that this simple question has stumped this group of students who have not yet started.

Professor Zhang shook his head helplessly. It seems that he had hoped too much. He thought at least two or three students could do it, but none raised their hands.

And that kid Su Lu, who definitely would, didn't even raise his hand.

Professor Zhang wanted to use Su Lu to stimulate this group of students, but he couldn't be too obvious, so he said, "Is there no reward, so you don't want to go?"

Everyone was speechless for a while, professor, it's not a question of whether to reward or not, okay?

It's obviously a question that you can't do at all, okay! !

However, Professor Zhang didn't understand the meaning of their expressions, and continued: "Well, whoever answers the questions will get full marks this semester."

Under the reward, there must be a brave man.

Su Lu raised his hand at lightning speed and shouted, "Me!"

Although he can get full marks whether he answers or not, but he just wants this reward...

Then he saw that Professor Zhang was already looking at him with a smile.

"Okay, Su Lu, come up and write."

Su Lu's enhanced brain analyzed it within 05 seconds, and he was fished by the professor.

Waiting for him to take the bait!

Speechless, but it was not a big problem, he walked up to the podium under the gaze of everyone, and began to write down the steps to solve the problem.

"In regression analysis, the regression coefficient is tested using t statistics, and the degree of freedom is n-2=20-2=18, so the significance of β01 is tested at the significance level of 1, if｜ t|>t005(18), it is necessary to reject the null hypothesis, indicating that the influence of the independent variable on the dependent variable is significant."

"So, the solution to this question is t005(18)."

Chapter 44 I Didn't Expect You To Be A Sister-in-Law

After writing the answer, Su Lu clapped his hands and walked back.

The students in the audience were dumbfounded.

Su Lu... so awesome?

The masters who had previewed saw the problem-solving ideas on the blackboard, and suddenly realized.

"Oh! I remember what test to use for significance. It turned out to be a t-test. I almost remembered it!"

"Damn it, why is the degree of freedom reduced by two? Isn't the general t-test reduced by one?"

……

Wang Yang and the others turned their heads sideways and looked at Su Lu quietly, as if they could cut his head open and see what was growing inside.

"Lao Liu, this is the rhythm to rise up."

"He was perfunctory to us this morning, saying what, Lao Zhang just told him to study hard. This is obviously a small matter!"

Ning Shiyuan tapped Su Lu's shoulder, and whispered, "Look to your right, is that your roommate? They're all looking at you."

Su Lu turned his head, took a look, frowned, and said, "What are you looking at?"

Mai Ke is an authentic Northeasterner, and replied on the spot: "What are you doing?"

It has an inner taste!

Su Lu: "Would you like to watch again?"

"Just look!"

The three shouted together.

Su Lu: "..."

After making an international gesture, he turned to Ning Shiyuan and said, "They are jealous."

"What are you jealous of?" Ning Shiyuan asked.

"Jealous of me."

"why?"

"Because I'm handsome."

Ning Shiyuan rolled his eyes at him, then lay down on the table and said, "Yes, yes, you are the most handsome, my younger brother!"

Su Lu chuckled, and said casually, "Maybe they still envy you."

Ning Shiyuan blinked and asked, "Why?"

"They think of you as my girlfriend."

Ning Shiyuan blushed, she avoided Su Lu, and said angrily, "Nonsense!"

Su Lu turned his head to look at her, and shook his head slightly.He said this sentence because of the "sequelae", but after saying it, he didn't have the mentality of cursing, but rather had a sense of expectation.

Hearing Ning Shiyuan's answer, he was a little disappointed for no reason, so he turned his head and looked at the podium again.

After he worked out the problem, Professor Zhang couldn't help but praise for a while.

"Student Su Lu's idea of ​​solving the problem is correct. This problem will be discussed in the part of Chapter 3 regression analysis, so I won't give you the details here."

He picked up the book and said: "I won't talk about how hard you have to study. Everyone should know how to ask questions when they encounter problems. For this kind of subject involving mathematics, you must remember to do more, ask more questions, and just read books." It's useless, this subject is not like the ones you learned before, just memorize it."

……

"Okay, let's start the class, everyone first turn to the catalog page..."

Professor Zhang does not often use ppt in his lectures. He has been teaching for more than 30 years and is used to the traditional way of teaching, not to mention econometrics, which is biased towards mathematics. He often needs to do calculations on the blackboard, which is naturally more convenient than ppt.