Aresearcher studies the impact of cell phone use during class lectures on college students’ exam scores. whether the results of this study us to understand the relationship between cell phone use during class lectures and work performance in real-life institutions is a question of the original research hypothesis. study confounds. internal validity. external validity.

External validity.

Explanation:

Whether the results of this study help us to understand the relationship between cell phone use during class lectures and work performance in real-life institutions is a question of external validity. Whether the conclusions of a scientific study can be applied to other institutions and other activities is a matter of external validity. External validity is the generalization of the results of a scientific study to other contexts.

answer; a cost benefit analysis;

answer; personally distressful;