His results are summarized in the dot plot below, where each dot represents the sample median from a sample of five balls. So he does this. He takes these five balls, puts them back in, then he does it again, then he does it again, and every time, he calculates the sample median for that sample, and he plots that on the dot plot. So, and he'll do this for 50 samples. And each dot here represents that sample statistic, so it shows that four times we got a sample median. In four of those 50 samples, we got a sample median of 20. In five of those sample medians, we got a sample median of 10.