No I don't think so because his or her peers could "cheat" meaning that they could lie and get him out of trouble. Another reason why they shouldn't is because if some of his or her peers didn't like he or she they could make it so that he or she would for sure get in trouble.
Answer: Political scientist
Explanation:
Political scientist is the person who studies beginning, development, trend and function of any political system as a finding or research.This study is based on studying political regulation, operations, government policies,political history etc.
According to the question, David should contact political scientist for gaining information about highest expected age-group to vote in election as per their analyzation and study of political system or field and trend.
External validity
Sigmund freud's psychoanalytic theory was based primarily on descriptive data from a few case studies. Critics question how well the experiences of these unusual individuals represent others. The concern referred to is that this type of research may lack external validity.
External validity is the extent to which the information and theories of a study can be generalized to other conditions or to other people. People, places and times are the three major threats ( factors that could be wrong) to external validity
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Answer:
Answer is Vicksburg. Hope this helps ;>
Explanation: