Or that the mean with the drug is still going to be 1.2 seconds, our mean response time. Now if we wanted to do a one-tailed test, and for some reason we already had maybe a view that this drug would lower response times, then our alternative hypothesis, and just so you get familiar with different types of notation, some books or teachers will write the alternative hypothesis as H1, sometimes they write it as H alternative, either one is fine. If you want to do a one-tailed test, you could say that the drug lowers response time. Or that the mean with the drug is less than 1.2 seconds. Now if you do a one-tailed test like this, what we're thinking about is, what we want to look at is, we have our sampling distribution. Actually I can just use the drawing that I had up here. You had your sampling distribution of the sample mean.