HoM p. 655-656 [Literary Digest and Gallup polls: examined
the issues surrounding the 1936 presidential election, including biased
polling,
and how George Gallup made his name by accurately predicting the election with a small (but randomized) sample.]
p. 650 [collection of data and embarrassing questions]
p. 656 [sample bias]
p. 657 [asking the right questions]
p. 713 [infer data of the entire population via sample,
some fact about reality is unknown so we employ statistical
analyses to determine what is likely true]
p. 716-717 [confidence intervals and margin of error]

Did you notice that the graph starts at age 25 rather than 18?

p. 647-649 [graphical distortion]