What level of measurement is used for age group?

Age group is typically measured using ordinal scale, as it categorizes individuals into ordered groups (e.g., 0-18, 19-35, 36-50, etc.) representing a range of ages. While the groups themselves do not have a precise numeric value, they imply a ranking or progression in age. In some contexts, it can also be treated as nominal if the focus is solely on the categories without regard to order.