B Equation to approximate percent likelyhood of different sigma events

AI Thread Summary
An equation to approximate the percentage likelihood of different sigma events based on standard deviation values is sought, specifically for values like 1 sigma (33%) and 3 sigma (0.27%). The discussion emphasizes the need for an algebraic solution rather than a calculus-based approach. A reference to the Wikipedia page on the error function is suggested for potential formulas. The focus remains on finding a simple mathematical approximation for sigma probabilities. This inquiry highlights the importance of accessible statistical tools for understanding probability distributions.
jaydnul
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Hi!

I was wondering if there was an equation to plug in a standard deviation value and get back approximately the percent likely hood of getting that sigma (for example 1 sigma would be 33%, 3 sigma 0.27%, etc).

Just something that approximates it with algebra, no calculus

Thanks!
 
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