/sci/ - Science & Math

>What do you guys think this probability distribution is? :^)))

>>7219858
It is represented as a bell curve.

How does one find the standard deviation of something that has a percentage chance of happening?

Say something has a 1% chance of happening. The average is clearly going to be 100 attempts, but how would I find the variance when I don't exactly have a population to test? I've had to do this twice now, and google has turned up nothing both times. What I've been doing is using python to generate the population, and then using that list to find the variance, but there has to be a formula for this out there somewhere.

I seem to be stumped. I'm trying to find out the value of the width of a bell curve from its area under the curve and height. Is there a non-calculus method to solve this?

need some stat help for work

I have to evaluate samples from 2 different locations. The problem is the sum from the 2 locations is never the same. Lets location a has 100 samples and location b has 30. If I take 10% from each location(10 and 3) and location b gets 2 wrong, then thats a 66% failure rate which doesn't properly reflect the location. I guess what I'm asking is, is it possible to take the same percent from both locations and still accurately display my findings or should I implement a curve, and if so, how?