AI reviewed · sources pending. Book associations have not been verified.
Bounded proportion
ConceptA proportion of a fixed defined population lies between zero and one.
Explanation or usage
Equivalently, its percentage lies between 0% and 100%. A model predicting beyond those bounds has left the feasible range for that quantity. The violation identifies a model limitation rather than a possible population proportion.
Common misunderstandings
A percentage representing a population share can exceed 100% if its historical slope stays positive.
In How Not to Be Wrong
General context reviewed · book attribution and sources pending
Physical or definitional bounds can help check whether a proposed long-run trend remains feasible.