/sci/ - Science & Math

>>15055522
countless people pronounce it SD, and that is what's most common
when discussing it among peers, i.e. people familiar with statistics, "sigma" is also definitely quite common
seeing as how you were seemingly unaware of what percentile the different SDs cover, I certainly would not assume that you have a very high degree of familiarity with statistics
a good rule you can remember for the future is the 68-95-99.7-rule, which refers to the percentiles covered by each SD