Read Chapter 11 of the red textbook and come prepared after the break with any questions you have about that material. Pay particular attention to 11B (the definitions in 11A for types of sampling error are less critical, but you should be able to recognize when a sample is likely to be biased).
Then, complete the following questions.
Exercise 11D questions 2 and 4
Exercise 11F question 1
Exercise 12A questions 2b and 13
Read section 12B.
Exercise 12C questions 2 and 5
Exercise 12D questions 6 and 7