Now let's answer these questions. What type of statistical study did Alma use? Well, she used a, she's trying to estimate a parameter for a population, in this case, the parameter was the percentage of all of the bacteria that died, she couldn't observe that directly, so instead, she took a random sample of the bacteria in the Petri dish, and she used, she calculated a statistic for them, 94% of them were dead, and that's her estimate for the population parameter, the percentage of the population that died. 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?