> You can't assume that the mix is 50-50 I don't assume that it's a 50/50 split. I assume it's somewhere between 0% female to 100% female. And it's a big sampl

> You can't assume that the mix is 50-50 I don't assume that it's a 50/50 split. I assume it's somewhere between 0% female to 100% female. And it's a big sample. If a mix of (men and women) doesn't perform somewhere between the all-male and all-female groups, that's a big problem with their hypothesis. They're saying something equivalent to Group A scores mean 90 and Group B scores mean 95. If you then take a very large set of people that is drawn from Group A and Group B with an unknown proportion and they score mean 85 or 100, that would be fairly devastating to the claim. I'm not saying that this should be weighted into the main analysis. I'm saying they should test their hypothesis with this.