Confidence.js is based on the A/B testing code that we use at sendwithus.
A/B testing math is hard and we've worked really hard on making this great. Let us know what you think!
Thanks for bringing that to my attention - I agree that our explanation is a little more convoluted than it needs to be. I'll update that later today to be more "readable" ;)
Can you recommend a resource that explains the Math for people who slept through statistics class?
I actually need to brush up on this topic for a new project so anything you can recommend would be greatly appreciated.
Thanks!
We did a lot of digging and there aren't a lot of resources that are easy to digest - but this one really stood out to us:
http://visualwebsiteoptimizer.com/split-testing-blog/what-yo...
I'd love to write a summary of everything I've learned - maybe a blog post in the near future!
This is where I personally think javascript programming is going wrong at the moment, so much boiler plate.
You're also programming a bit too defensively. Ask yourself, do you honestly need all those checks? What would actually happen if you got rid of the checks? I think your code would be clearer without them and the programmer would still realize he'd made a mistake and passed in nulls.
Confidence.js comes from how we operate on A/B tests at sendwithus - we think of them as variants associated with results. While the code could definitely boil down to a few simple math functions, we find objects to be a good way to organize our data models.
Your project is great, I'd totally use at work. Also, it was to learn the math behind that. Thanks!