Answer:
Discrete variable arises from counting process. Example: number of students in a class, number of global subscribers
Continuous variable arises from measuring process. Example: age, height, weight
Nominal is a data scale measurement. It classifies data into labels/categories with no ranking/order. Example: course, gender, hair color
Ordinal is also a data scale measurement. It demonstrates the characteristics of nominal data, but has no order. Example: year level, academic honors, satisfaction ratings
