Please note that the Theme Scientist app doesn't support "split test" testing. With Theme Scientist, 100% of your site traffic goes to one theme, and then at the time interval you choose, 100% of your site traffic goes to the other theme.
With some other apps, they split the test, with 50% of site traffic going to one theme and 50% of site traffic going to the second theme. That is not how Theme Scientist testing works. We feel the best results are achieved by 100% of your site traffic is going to each theme.