1.

A store-bought pregnancy test produces a correct result 99% of the time when a woman is actually

pregnant but is only 97% accurate when a woman is not pregnant. What are the chances of a false

positive and a false negative respectively?

2.

Assuming a woman has a 90% chance of actually being pregnant when she takes the test, and that she

takes TWO tests (requiring the same signal from both tests to either confirm OR reject) what is the

probability of she will get a "double positive" result? Also, what is the probability of an "uncertain"

result (one of each)?