yes_procrast·13 anni fa·discussAgreed, I'll add a line break to denote that they're separate thoughts. 1-sigma is indeed 68%.
yes_procrast·13 anni fa·discussIn physics, we use 2-sigma (95%) limits all the time. 5-sigma (99.9999%) is generally required only for a claim of detection.If you're just feeling your way around in the dark, 2-sigma is a useful way to work, so we use that to guide exploration.Why 2-sigma? Well, it's twice as big as 1-sigma.Experiment didn't go well, but you need a more-impressive result? Use a 90% confidence interval instead of 95%.