And we're gonna talk about two things. The different conclusions you might make based on the different significance levels that you might set, and also why it's important to set your significance levels ahead of time, before you conduct an experiment and calculate the p-values, for frankly, ethical purposes. So to help us get this, let's look at a scenario right over here, which tells us, Rahim heard that spinning, rather than flipping a penny, raises the probability above 50% that the penny lands showing heads. That's actually quite fascinating, if that's true. He tested this by spinning 10 different pennies, 10 times each, so that would be a total of 100 spins. His hypotheses were, his null hypothesis is that, by spinning, your proportion doesn't change, rather, versus flipping, it's still 50%. And his alternative hypothesis is that, by spinning, your proportion of heads is greater than 50%, where p is the true proportion of spins that a penny would land showing heads.