uences. (See Lesson <a href="L26-Experiment.html" class="quarto-xref"><span>26</span></a>.) You will still see this statement in statistical textbooks, and news reports will endorse it by identifying “<strong>Random controlled trials</strong>” as the “Gold Standard” of causal relationships. </p><div class="no-row-height column-margin column-container"><span class="margin-aside">See <a href="https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(15)60742-5/fulltext">this article</a> in the p