The “…new equivalence test, published in October, flips the traditional null hypothesis framework on its head. Now, rather than assuming similarity, a researcher starts with the assumption that the two groups are different. The burden of proof now lies with evaluating the degree of similarity, rather than the degree of difference.”

https://theconversation.com/the-equivalence-test-a-new-way-for-scientists-to-tackle-so-called-negative-results-106041