All of the math you need to do straightforward A/B testing is in elem.com/~btilly/effective-ab-testing/. Along with a lot of other useful information. (Don't try to comprehend the whole thing in one sitting.)
That's a very good resource. I have a copy that I've printed out and written all over.
My next post in the series is going to be about "the math" and I'll likely refer to your presentation quite a bit. Do you have an audio or video recording of it being presented?