Operations Management
July-August 2016
OPMG
Prof. Kesavan
Assignment 1 (20 points)
Note: This is an individual assignment. You may not discuss the solutions with
anyone else. Read chapters 3 and 4 to understand the concepts covered in these
questi

SMMD
Class 10
Richard P. Waterman
Wharton
May 23, 2016
May 21, 2016
1 / 19
Class 10 Table of Contents
1
What you need to know from last time
2
Todays material
3
Categorical variables as predictors (two groups)
4
Example, Salary.jmp
5
Interaction in regres

SMMD
Class 9
Richard P. Waterman
Wharton
May 23, 2016
May 19, 2016
1 / 22
Table of contents I
1
What you need to know from last time
2
Todays material
3
Collinearity
Definition
What is sxk (adjusted) ?
4
The market model
5
The consequences of collinearity

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2008
Solutions, Final Exam
(1)
(2) Assuming the MRM holds, if the 95% confidence interval for the intercept 0 in a
multiple regression model is the interval [-18, 5

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2009
Final Exam
Read these instructions carefully.
This is a closed-book exam. You are allowed to use a simple calculator and one page
(8.5 by 11 inches or A4, both

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2008
Final Exam
Read these instructions carefully.
This is a closed-book exam. You are allowed to use a calculator and one page (8.5 11 inches
or A4, both sides) of

SMMD
Supplemental notes: interpretations of log regressions
Richard P. Waterman
Wharton
May 11 2016
May 11, 2016
1/3
Log transforms and their interpretations
Note: all percent change interpretations for log transforms are only valid if
the percent change

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2010
Final Exam
Read these instructions carefully.
This is a closed-book exam. You are allowed to use a simple calculator and one page (8.5
by 11 inches or A4, both

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2009
Final Exam
Read these instructions carefully.
This is a closed-book exam. You are allowed to use a simple calculator and one page
(8.5 by 11 inches or A4, both

Department of Statistics
The Wharton School
University of Pennsylvania
Statistics 621
Fall 2010
Final Exam
Read these instructions carefully.
This is a closed-book exam. You are allowed to use a simple calculator and one page (8.5
by 11 inches or A4, both