> Suppose you're testing for something that only occurs in 1% of the population or less. What if the Theranos test just never returns a positive? Then that test

> Suppose you're testing for something that only occurs in 1% of the population or less. What if the Theranos test just never returns a positive? Then that test is "99% accurate" compared to the "normal" test. Understanding statistics is very important here: http://www.kevinmd.com/blog/2015/11/the-controversy-over-theranos-misses-the-larger-point.html http://www.kevinmd.com/blog/2015/11/the-controversy-over-the...