You may be interested in this seven session course offered by Marketing Experiments Journal on Becoming a Certified Online Testing Professional. Here is the description of this course:

"In this 7 session course we will show you exactly how we setup, optimized, and achieved an 816% increase in conversion for one of our research partners. You will see the exact pages, before and after results, and methodology we use every day to significantly improve conversion using the MEC Conversion Formula. Not only will you see how we use it to optimize the sites we work with but you will be applying it to one of your own sites as part of the course."

I have long recommended Marketing Experiments Journal as one of the best resources for market research on Internet e-commerce subjects.