File:Wilson score interval and logistic example.png

Summary
Wallis, Sean. Original image by author. A version of this plot is published in Wallis (2021: 180).

Wilson score intervals for n = 10 and n = 100 computed alongside an example logistic curve. Unlike the normal approximation interval, the Wilson interval performs correctly for small samples (e.g. n = 10) or where p is close to 0 or 1.