Yes, but virtually every published peer-reviewed study will have a large enough sample size and will have done the math to make sure that it is large enough.<p>If it&#x27;s the first thing that comes to the mind of random HN commenters who haven&#x27;t even read the actual article, it&#x27;s probably also going to occur to the experts writing and reviewing the article.<p>Peer reviewed articles aren&#x27;t perfect, but it&#x27;s pretty arrogant to think that the authors and reviewers are so bad at research that you can find problems with them without even reading them.