Business Statistics, Winter 2025

Instructor

Tengyuan Liang, [email protected], JP Gan Professor of Econometrics and Statistics

TAs

Wenxuan Guo, [email protected], Doctoral Candidate, Econometrics and Statistics

Syllabus

Syllabus

Lecture Notes

Section 1

Section 2

Section 3

Section 4

Section 5

Key Points

Practice Exam

Practice Midterm, Practice Solution

Practice Final, Practice Solution

Homework

Homework 1, Solution 1

Homework 2, Solution 2

Homework 3, Hint for Homework 3, Solution 3, Solution Q1 and Q2 in R, Q1 in Excel, Q2 in Excel

Homework 4, Solution 4

Homework 5, Solution 5

Homework 6, Solution 6

Homework 7, Solution 7

Homework 8, Solution 8

Questions about the homework can be posted to the Canvas Discussion section. TAs will answer them within 24-48 hrs during weekdays. I recommend everyone to do all the homework.

R Scripts (optional)

Dummies and Interactions

SLR and MLR

Annual Return, Hint for Discussion

Stock Hedge

Section 1

Section 2

Section 3

Section 4

Section 5

Datasets

Shock Absorber Data

Apple, Intel, Safeway Data

Profits

Zagat

Baseball

Orion Bus

Beauty

Mid City

Salary Data

S&P 500 cleaned

Other Fun Statistics

Seeing Theory

FiveThirtyEight article

COVID-19 prevalence rate

Simpson's Paradox: video1, video2

Guessing Correlation: wiki, game

Spurious Correlation

Demonstration of Normal Approximation/CLT, and more

Demonstration of Confidence Interval

Chicago Booth Review Article

AI? Not yet

XKCD, hypothesis testing, can you get the point?

Moneyball

Simple Linear Regression App, play!

XKCD, slope hypothesis testing, can you figure out why?