Code for Descriptive Statistics

• chap_1_ex_2.R (solves exercise 2)
  
• chap_1_ex_3.R (solves exercise 3)
  
• chap_1_ex_5.R (solves exercise 5)
  
• chap_1_ex_6.R (solves exercise 6)
  
• chap_1_ex_8.R (solves exercise 8)
  
• chap_1_ex_9.R (solves exercise 9)
  
• chap_1_ex_11.R (solves exercise 11)
  
• chap_1_ex_12.R (solves exercise 12)
  
• chap_1_ex_13.R (solves exercise 13)
  
• chap_1_ex_14.R (solves exercise 14)
  
• chap_1_ex_16.R (solves exercise 16)