So this is, when you're using a random sample to generate a statistic which estimates a parameter for a population, that's a sample study. So she ran a sample study. Now the next question is, is the study appropriate for the statistical questions it's supposed to answer? So what was the question that she's trying to answer? Well, at least the way it's written, it seems like she's trying to answer whether or not her antibiotic works, whether it's an effective antibiotic, whether it's capable of killing bacteria. And you might be tempted to say, okay, well look, it looks like it killed, it killed more than 90% of the bacteria, or it very likely killed more than 90% of the bacteria, given the sample size and the margin error and all of that, but even if it is indeed the case that 95% of all of the bacteria died, it doesn't necessarily mean that it was caused by the antibiotic. Maybe it was caused by the plastic in the Petri dish.