Question

The idea that we assign intent and meaning to peoples behaviors based on the social groups of which they are a part, is called:

Discrimination
Stereotype
Inferences
Attribution

Answer 1

-stereotype.
-the dictionary definition for stereotype is a fixed idea that many people have about a thing or a group that may often be untrue or only partly true, which is similar to the definition you provided.
-a common stereotype is that girls have to play with dolls and wear dresses while boys have to play with trucks and mud