Answer:
Mode or the median
Step-by-step explanation:
According to the case of Margaritte's sociology group data, the best representation of the 'average' age for the group discussion can be done by either median of the group data or its mode.
Median of the data can be defined as when we arrange the data in the ascending order then the middle term of that data represents the median.
Mode of the data is the most frequently occurring term in the data.
Both these values are the central tendencies of the data.