Problem:
Read the following press release, then answer the questions below. "Study Proves BrainBoost Supplement Dramatically Improves Student Focus" Press Release - BrainBoost Labs A new study confirms that BrainBoost, a dietary supplement manufactured by BrainBoost Labs, significantly improves focus and concentration in college students. The study, funded by BrainBoost Labs, was conducted at a small private university. Researchers recruited 25 students from one psychology class and divided them into two groups: Group A took the BrainBoost supplement daily for two weeks. Group B took no supplement. Both groups knew which group they were in. After two weeks, both groups took a focus test. Group A scored 8% higher than Group B on average. BrainBoost Labs says the results confirm the supplement's effectiveness. Your Task Evaluate the BrainBoost study by answering the following questions in complete sentences. Use what you learned in Section 5.2 to support your answers. Sample size: Is 25 students a strong enough sample to support the conclusion? Explain why or why not. Representativeness: The students were all from one psychology class at one university. Does this sample represent all college students? Why or why not? Blind study: Both groups knew which group they were in. How could this affect the results? (Think about the self-fulfilling prophecy and why blind or double-blind studies matter.) Bias: BrainBoost Labs funded the study and published the results. Need Assignment Help?