# Linear Regression for Business Statistics

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About this course: Regression Analysis is perhaps the single most important Business Statistics tool used in the industry. Regression is the engine behind a multitude of data analytics applications used for many forms of forecasting and prediction. This is the fourth course in the specialization, "Business Statistics and Analysis". The course introduces you to the very important tool known as Linear Regression. You will learn to apply various procedures such as dummy variable regressions, transforming variables, and interaction effects. All these are introduced and explained using easy to understand examples in Microsoft Excel. The focus of the course is on understanding and application…

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About this course: Regression Analysis is perhaps the single most important Business Statistics tool used in the industry. Regression is the engine behind a multitude of data analytics applications used for many forms of forecasting and prediction. This is the fourth course in the specialization, "Business Statistics and Analysis". The course introduces you to the very important tool known as Linear Regression. You will learn to apply various procedures such as dummy variable regressions, transforming variables, and interaction effects. All these are introduced and explained using easy to understand examples in Microsoft Excel. The focus of the course is on understanding and application, rather than detailed mathematical derivations. Note: This course uses the ‘Data Analysis’ tool box which is standard with the Windows version of Microsoft Excel. It is also standard with the 2016 or later Mac version of Excel. However, it is not standard with earlier versions of Excel for Mac. WEEK 1 Module 1: Regression Analysis: An Introduction In this module you will get introduced to the Linear Regression Model. We will build a regression model and estimate it using Excel. We will use the estimated model to infer relationships between various variables and use the model to make predictions. The module also introduces the notion of errors, residuals and R-square in a regression model. Topics covered include: • Introducing the Linear Regression • Building a Regression Model and estimating it using Excel • Making inferences using the estimated model • Using the Regression model to make predictions • Errors, Residuals and R-square WEEK 2 Module 2: Regression Analysis: Hypothesis Testing and Goodness of Fit This module presents different hypothesis tests you could do using the Regression output. These tests are an important part of inference and the module introduces them using Excel based examples. The p-values are introduced along with goodness of fit measures R-square and the adjusted R-square. Towards the end of module we introduce the ‘Dummy variable regression’ which is used to incorporate categorical variables in a regression. Topics covered include: • Hypothesis testing in a Linear Regression • ‘Goodness of Fit’ measures (R-square, adjusted R-square) • Dummy variable Regression (using Categorical variables in a Regression) WEEK 3 Module 3: Regression Analysis: Dummy Variables, Multicollinearity This module continues with the application of Dummy variable Regression. You get to understand the interpretation of Regression output in the presence of categorical variables. Examples are worked out to re-inforce various concepts introduced. The module also explains what is Multicollinearity and how to deal with it. Topics covered include: • Dummy variable Regression (using Categorical variables in a Regression) • Interpretation of coefficients and p-values in the presence of Dummy variables • Multicollinearity in Regression Models WEEK 4 Module 4: Regression Analysis: Various Extensions The module extends your understanding of the Linear Regression, introducing techniques such as mean-centering of variables and building confidence bounds for predictions using the Regression model. A powerful regression extension known as ‘Interaction variables’ is introduced and explained using examples. We also study the transformation of variables in a regression and in that context introduce the log-log and the semi-log regression models. Topics covered include: • Mean centering of variables in a Regression model • Building confidence bounds for predictions using a Regression model • Interaction effects in a Regression • Transformation of variables • The log-log and semi-log regression models

Created by:  Rice University
• Taught by:  Sharad Borle, Associate Professor of Management

Basic Info Course 4 of 5 in the Business Statistics and Analysis Specialization Commitment 4 weeks of study Language English How To Pass Pass all graded assignments to complete the course. User Ratings 4.8 stars Average User Rating 4.8See what learners said Coursework

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Syllabus

WEEK 1

Regression Analysis: An Introduction

7 videos, 13 readings, 6 practice quizzes expand

1. Video: Meet the Professor
4. Video: Introducing Linear Regression: Building a Model
7. Practice Quiz: Practice Quiz
8. Video: Introducing Linear Regression: Estimating the Model
11. Practice Quiz: Practice Quiz
12. Video: Introducing Linear Regression: Estimating the Model
15. Practice Quiz: Practice Quiz
16. Video: Introducing Linear Regression: Predictions using the Model
19. Practice Quiz: Practice Quiz
20. Video: Errors, Residuals and R-square
23. Practice Quiz: Practice Quiz
24. Video: Normality Assumption on the Errors
26. Practice Quiz: Practice Quiz

WEEK 2

Regression Analysis: Hypothesis Testing and Goodness of Fit

6 videos, 15 readings, 6 practice quizzes expand

1. Video: Hypothesis Testing in a Linear Regression
3. Reading: Toy Sales (with regression).xlsx
4. Reading: Toy Sales (with regression, t-statistic).xlsx
5. Reading: Toy Sales (with regression, t-cutoff)
7. Practice Quiz: Practice Quiz
8. Video: Hypothesis Testing in a Linear Regression: using 'p-values'
11. Practice Quiz: Practice Quiz
12. Video: Hypothesis Testing in a Linear Regression: Confidence Intervals
15. Practice Quiz: Practice Quiz
16. Video: A Regression Application Using Housing Data
19. Practice Quiz: Practice Quiz
20. Video: 'Goodness of Fit' measures: R-square and Adjusted R-square
23. Practice Quiz: Practice Quiz
24. Video: Categorical Variables in a Regression: Dummy Variables
27. Practice Quiz: Practice Quiz

Graded: Regression Analysis: Hypothesis Testing and Goodness of Fit

WEEK 3

Regression Analysis: Dummy Variables, Multicollinearity

6 videos, 12 readings, 6 practice quizzes expand

1. Video: Dummy Variable Regression: Extension to Multiple Categories
4. Practice Quiz: Practice Quiz
5. Video: Dummy Variable Regression: Interpretation of Coefficients
7. Practice Quiz: Practice Quiz
8. Video: Dummy Variable Regression: Estimation, Interpretation of p-values
12. Practice Quiz: Practice Quiz
13. Video: A Regression Application Using Refrigerator data
16. Practice Quiz: Practice Quiz
17. Video: A Regression Application Using Refrigerator data (continued...)
20. Practice Quiz: Practice Quiz
21. Video: Multicollinearity in Regression Models: What it is and How to Deal with it
24. Practice Quiz: Practice Quiz

Graded: Regression Analysis: Model Application and Multicollinearity

WEEK 4

Regression Analysis: Various Extensions

7 videos, 11 readings, 6 practice quizzes expand

1. Video: Mean Centering Variables in a Regression Model
4. Practice Quiz: Practice Quiz
5. Video: Building Confidence Bounds for Prediction Using a Regression Model
8. Practice Quiz: Practice Quiz
9. Video: Interaction Effects in a Regression: An Introduction
11. Practice Quiz: Practice Quiz
12. Video: Interaction Effects in a Regression: An Application
15. Practice Quiz: Practice Quiz
16. Video: Transformation of Variables in a Regression: Improving Linearity
18. Practice Quiz: Practice Quiz
19. Video: The Log-Log and the Semi-Log Regression Models