Code for Linear Regression and Its Cousins

• chap_7_prob_1.R (solves chapter 7 problem 1)
  
• chap_7_prob_2.R (solves chapter 7 problem 2)
  
• chap_7_prob_3.R (solves chapter 7 problem 3)
  
• chap_7_prob_4.R (solves chapter 7 problem 4)
  
• chap_7_prob_5.R (solves chapter 7 problem 5)
  
• chap_7_prob_5.py (auxiliary routine for problem 5)