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
Messages
558
Reaction score
15
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!
 
Mathematics news on Phys.org
Thread 'Video on imaginary numbers and some queries'

Thread 'Video on imaginary numbers and some queries'

Hi, I was watching the following video. I found some points confusing. Could you please help me to understand the gaps? Thanks, in advance! Question 1: Around 4:22, the video says the following. So for those mathematicians, negative numbers didn't exist. You could subtract, that is find the difference between two positive quantities, but you couldn't have a negative answer or negative coefficients. Mathematicians were so averse to negative numbers that there was no single quadratic...
View full post »
Thread 'Unit Circle Double Angle Derivations'

Thread 'Unit Circle Double Angle Derivations'

Here I made a terrible mistake of assuming this to be an equilateral triangle and set 2sinx=1 => x=pi/6. Although this did derive the double angle formulas it also led into a terrible mess trying to find all the combinations of sides. I must have been tired and just assumed 6x=180 and 2sinx=1. By that time, I was so mindset that I nearly scolded a person for even saying 90-x. I wonder if this is a case of biased observation that seeks to dis credit me like Jesus of Nazareth since in reality...
View full post »
Thread 'Imaginary Pythagoras'

Thread 'Imaginary Pythagoras'

I posted this in the Lame Math thread, but it's got me thinking. Is there any validity to this? Or is it really just a mathematical trick? Naively, I see that i2 + plus 12 does equal zero2. But does this have a meaning? I know one can treat the imaginary number line as just another axis like the reals, but does that mean this does represent a triangle in the complex plane with a hypotenuse of length zero? Ibix offered a rendering of the diagram using what I assume is matrix* notation...
View full post »

Similar threads

B Sigma Multiplied Gaussian Distribution
Replies
2
Views
2K
B Calculating Percents: A/B vs. B/A
Replies
7
Views
2K
I Optimization problem with multiple outputs: impossible?
Replies
6
Views
2K
I Some notes on stochastic physics
Replies
1
Views
2K
A Derivation of free fields... coefficient question
Replies
5
Views
2K
How to appropriately assign sigma values (uncertainty)
Replies
9
Views
2K
I On error estimates of approximate solutions
Replies
1
Views
3K
I Understanding the meaning of "uncertainty" in Heisenberg's UP
Replies
10
Views
2K
Sigma notation and calculator help(casio fx9860g; ti-30xpro)
Replies
8
Views
4K
A E-writing Action on a different slice of space-time, Quantum Hall Effect
Replies
1
Views
1K

Hot Threads

Recent Insights

Back
Top