To read for the midterm (and final)
Chapter 2 : up to 2.5.4 ( not including 2.5.4)
In 2.5 you don’t have to learn the proofs, just know which estimators are biased and when( why) the bias disappears.
Chapter 3
Chapter 4 : sections 4.1, 4.2.1, 4.2.2
Chapter 5 : section 5.7
Chapter 6: section 6.2, examples 6.1, 6.4, 6.7
Chapter 7: sections 7.2.1, 7.2.2, 7.4, 7.5, 7.7
Chapter 8: section 8.4
Chapter 9: section 9.3, examples 9.1 and 9.2