Imagine a medical study which would have generalizing problems and describe it for the class. What would you revise in the study for more reliable conclusions?

This week concerns topics that apply to healthcare, such as scientific generalizing from a sample. Read the article below in addition to Chapter 11. Imagine a medical study which would have generalizing problems and describe it for the class. What would you revise in the study for more reliable conclusions?
Article:
https://www.npr.org/sections/13.7/2013/02/25/172779912/science-a-relationship-you-may-not-understand

Reference:
Book : Critical Thinking, Chapter 9.
Moore, B., & Parker, R. (2021). Critical thinking. McGraw-Hill Education.

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