We're just saying, are they different than just doing nothing? So like we did do with all of our hypothesis tests, let's just assume the null. We're going to assume the null. And given that assumption, figure out if the likelihood of getting data like this or more extreme is really low. And if it is really low, then we will reject the null hypothesis. And in this test, like every hypothesis test, we need a significance level. And let's say our significance level we care about, for whatever reason, is 10% or 0.10.