You could have done a similar type of hypothesis test with the same experiment, where you only have a one-tailed test. And the way we could have done that is we still could have had the null hypothesis, we still could have had the null hypothesis be that the drug has no effect. Drug has no effect. 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.