[csours]

Edit: They kind of do this farther down in the article.

Considering this as a UX challenge - imagine a grid of 10,000 dots (100x100).

Draw one box around the base rate - the rate at which you expect to find the problem in the population. If the base rate is 1%, then the box is 10x10 = 100 dots.

Then color in the dots for the test positive rate (not false positive, just all positive tests) False positives would be the colored dots outside the box.

Next to that, put strikes through the dots corresponding to your expected false negative rate.