Oh, I just realized what I missed. You can use the ratio, but if you do you need to take the geometric mean, since it is a multiplying factor. The geometric mea

Oh, I just realized what I missed. You can use the ratio, but if you do you need to take the geometric mean, since it is a multiplying factor. The geometric mean of 2 and 0.5 is sqrt(2 * 0.5) or 1. So the expected ratio is 1.