When variables are properly defined as well as measured accurately, the study has External Validity.
External validity is another name for the generalizability of results, "whether there is a causal relationship across variations in people, attitudes, treatments, and outcomes." University.
External validity is the validity of applying the conclusions of a scientific study outside the context of that study. In other words, the extent to which research findings can be generalized to other situations, people, stimuli, and times.
Learn more about External Validity here: https://brainly.com/question/14127300
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