He then took a random sample of five balls and calculated the median of the sample. So we have this population of balls. He takes a, we know the population parameter. We know that the population median is 16, but then he starts taking a sample of five balls, so n equals five, and he calculates a sample median. Sample median. And then he replaced the balls and repeated this process for a total of 50 trials. His results are summarized in the dot plot below, where each dot represents the sample median from a sample of five balls.