Which attribute is NOT typically considered continuous?

The attribute that is not typically considered continuous is "Assignment Group." Continuous variables are those that can take any value within a certain range and are often measured or counted, leading to an infinite number of possible values. On the other hand, categorical variables are those that represent categories or groups and do not have a meaningful numerical relation among them.

In the context of the choices provided:

• Age, Cost, and Percent Complete are examples of continuous variables because they can take on a range of values. Age can be measured in years, months, or days, and can thus represent a near-infinite number of values. Cost can vary widely and can be expressed in different units such as dollars and cents, also allowing for many decimal points. Percent Complete can represent progress in any percentage from 0 to 100%, indicating a continuous measurement of completion.

In contrast, Assignment Group categorizes data into predefined groups, making it a categorical variable. Each group is distinct and cannot take on values between the groups. Thus, it does not fit the definition of a continuous attribute, which is why it is the correct choice for the question.