Pol Sci 630: Problem Set 5 - Regression Model
Interpretation - Solutions
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Grading Due Date: Friday, October 7th, 1.40 PM (Beginning of Lab)
Insert your comments on the assignment that you are grading above the

Problem Set 1
September 8, 2016
Problem 1(a). GRADER COMMENT: In part 1, everything is correct!
factorial(10) # 10! = 10*9*8*7*6*5*4*3*2*1 = 3628800
# [1] 3628800
factorial(8) # 8! = 8*7*6*5*4*3*2*1 = 40320
# [1] 40320
Problem 1(b).
factorial(15)/factoria

Pol Sci 630: Problem Set 1 - Probability Theory and
Distributions - Solutions
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Grading Due Date: Friday, September 9th, 1.40 PM (Beginning of Lab)
R Programming
Problem 1
Insert your comments on the assignment

Pol Sci 630: Problem Set 1 - Probability Theory and
Distributions
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Due Date: Wednesday, September 7th, 2016, 1.25 PM (Beginning of Class)
Note 1: It is absolutely essential that you show all your work, includin

Pol Sci 630: Problem Set 3 - Comparisons and Inference
- Solutions
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Grading Due Date: Friday, September 23rd, 1.40 PM (Beginning of Lab)
Insert your comments on the assignment that you are grading above the
sol

Pol Sci 630: Problem Set 2 - Solutions
Anh Le
September 9, 2016
Insert your comments on the assignment that you are grading above the
solution in bold and red text. For example write: GRADER COMMENT:
everything is correct! - 4/4 Points Also briefly point

Pol Sci 630: Problem Set 2
Anh Le
September 9, 2016
Note 1: It is absolutely essential that you show all your work, including intermediary steps, in your (mathematical) calculations and that you comment on your
R code to earn full credit (you can comment

Pol Sci 630: Problem Set 5 - Regression Model
Interpretation
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Due Date: Wednesday, October 5th, 2016, 1.25 PM (Beginning of Class)
Note 1: It is absolutely essential that you show all your work, including inter

Pol Sci 630: Problem Set 4 - Regression Model
Estimation
Prepared by: Anh Le (anh.le@duke.edu)
Due Date: Wed, September 28, 2015 (Beginning of Class)
1
Subset data frame
1.1
Download data
Download the following data from WDI and clean it as follows. Brief

Pol Sci 630: Problem Set 3 - Comparisons and Inference
Prepared by: Jan Vogler (jan.vogler@duke.edu)
Due Date: Wednesday, September 21st, 2016, 1.25 PM (Beginning of Class)
Note 1: It is absolutely essential that you show all your work, including intermed