Professor Hahn received a grant to study the relationship between childhood obesity and video game playing. Answer the following questions about Professor Hahn's research study:
A. Explain how Professor Hahn could use each of the following research methods to study this topic:
• Case study
• Survey
• Naturalistic observation
B. Design an experiment Professor Hahn could use to investigate this topic, including the following terms in the context of your design:
• Operational definition
• Independent and dependent variable
• Random assignment
C. Explain how Professor Hahn's experimental design would conform to ethical guidelines.
D. Explain how Professor Hahn would use statistics (including at least one measure of central tendency and inferential statistics) to examine the data from the study to reach a conclusion.