Graph showing the Six Sigma Distribution with +/- 1,5 Sigma Shift. This results with 99,999660232688% of the values being inside, and 0,000339767312% of the values being outside (one side of the tail only). This image by me is licensed under the Creative Commons Attribution-Share Alike 4.0 International license. Please credit the image as shown below. For digital documents and web pages please do include the links as shown below. Thank you.