Final answer:
To evaluate a person's performance relative to others in a group, comparing their performance to the group's mean (average) is typically how we determine if it's above or below average. The median, mode, and range can also provide additional insights but might not be as directly relevant for comparison.
Step-by-step explanation:
When evaluating a person's performance relative to others within a particular group, none of the options mean, median, mode, or range on their own can be singled out as the sole determinant. However, to get a sense of how an individual's performance compares to the group, we would consider the mean or average performance of the group as a baseline. To say whether an individual's performance is above or below the average, we would then compare their performance to the group mean.
The mean provides a calculation of the average performance and may serve as a good reference point but could be influenced by outliers. The median gives us the middle point of the data, which is not as affected by extreme scores. Mode might be less helpful unless we are considering the most common performance level. Range gives the extent of variation in performance but does not allow direct comparison to others' performances. It's generally useful to consider all of these measures, particularly the mean and median, to fully understand an individual's relative performance.