A Gaussian distribution is broken vertically into eight segments: each boundary is labeled from -4 sigma to +4 sigma. The percentage of cases in each portion are shown: 0.13%, 2.14%, 13.59%, 34.13%, 34.13%, 13.59%, 2.14%, 0.13%.
Once you are Real you can't be ugly, except to people who don't understand. – The Velveteen Rabbit