We're going to say, the first hypothesis is, we're going to call it the null hypothesis, and that is that the drug has no effect on response time. And your null hypothesis is always going to be, you can view it as a status quo. You assume that whatever you're researching has no effect. So drug has no effect. Or another way to think about it is that the mean of the rats taking the drug should be the mean with the drug is still going to be 1.2 seconds, even with the drug. So that's essentially saying it has no effect, because we know that if you don't give the drug, the mean response time is 1.2 seconds. Now, what you want is an alternative hypothesis.