Final answer:
The data set of the final score of each golfer in a tournament is a population because it encompasses all participants in the tournament, not just a subset of them.
Step-by-step explanation:
The data set of the final score of each golfer in a tournament represents the entire group of individuals who participated in the tournament. Therefore, this data set is considered a population because it includes all of the elements from the group of interest. In contrast, a sample would only represent a subset of the population, selected to make inferences about the whole group.
For instance, if the tournament organizers wanted to understand the average score based on a few golfers' scores, they would be dealing with a sample.