Question

Hilda is studying the effects of a major natural disaster on people living nearby. She finds that many of the victims are depressed and show stress-related symptoms. Why can't Hilda conclude that the natural disaster caused the depression and stress-related symptoms

Answer 1

Answer: She does not have any comparison group

Step-by-step explanation:

Comparison group is cluster of people in form of group that is used for evaluating and comparing task performed so that working condition of experiment can be known. Comparison group is subjected with same condition and equipment to measure progress and impact of experiment.

According to the question, Hilda does not have comparison group with whom she can actually compare that natural disasters effect on people as stress and distress.She cannot evaluate the condition of people without any similar reference.