How to Set Up a Headline Test?

I wanted him to go into the, what you kind of said the testing face of copywriting. How do you set up a test that is good and, you know, the lik and whend, like, the result of the test is significant or not? Ya, i'm disinterested in that, because i think a lot of people might set up tesks incorrectly. So for us, the general rule of thumb if you want to test successfully, is dramatically different x. That's where you're more likely to actually see statistically confident results.