CISC 7700X Midterm Exam

1.c
2.c
3.d; https://en.wikipedia.org/wiki/Raven_paradox
4.d
5.a
6.e: Consider extreme case of nobody being vaccinated; we'd expect nobody to die of the vaccine, but 2000 to die from smallpox.
     Even if 90% are vaccinated, we'd expect 90 deaths from vaccine, and 200 from smallpox.
7.c
8.b
9.b
10.d
11.e. p(x|y) = p(x,y)/p(y) is definition of conditional probability. 
12.a
13.b
14.a
15.d
16.a
17.b
18.c
19.d
20.c