Disease Testing Visualization
Suppose your doctor tests you for a terrible disease, and the results are
How worried should you be?
can be used to answer this question.
Suppose the total population is people.
Let D = Diseased
and H = Healthy.
The incidence of the disease in the population is
The disease testing accuracy is
- p(D | positive)
means the probability of having the disease given that you have tested positive.
This is the notation for representing a conditional probability.
- p(positive | D) =
p(negative | H)
= test accuracy, by definition.
- p(positive) is the total number of people that test positive
() divided by the total population ()