Why is population validity especially problematic for anderson and dill (2000)'s study 2? the sample varied too much. the internal validity was too low to generalize results to the population. the participants were all undergraduate students. the sample was too small?

The problem on Anderson's and Dill study is that the participants were all undergraduate students.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

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