The std. dev. of a binomial is sqrt(n p (1-p)). So for 19 coin flips that&#x27;s ~2.2, or 11%, not 23%.<p>Plus your setup is not relevant to the setup that they performed (check figure 3).<p>I am not so surprised that many studies are not replicated, but I also am not surprised when critical internet comments are weaker than the analysis they criticize.