So we're assuming the herbs do nothing. So if the herbs do nothing, then we can just figure out that this whole population, they just had nothing happen to them. These herbs were useless. And so we can use this population sample, or I shouldn't call it the population. We should use this sample right here to figure out the expected number of people who would get sick or not sick. And so over here we have 80 out of 380 did not get sick. And I want to be careful.