Generalization (noun)

1. The act or process of forming a general idea or conclusion from specific instances.
2. The result of generalizing; a general idea or conclusion.
3. The formation of a generalization based on incomplete information or experience.

Origin:

From middle french generalisation, from latin generalizare, from generalis 'general'.

Examples:

1. His generalization about the behavior of cats was proven to be incorrect.
2. The study showed a generalization about the relationship between exercise and heart health.
3. She made a generalization about the intelligence of a particular race, which was not supported by evidence.
4. The generalization that all politicians are corrupt is not always true.
5. The psychologist made a generalization about human behavior based on her studies with a small group.