Problem
What are the similarities and differences between random and systematic errors in epidemiological research in childhood obesity.
Can you help me find two articles about public health issues or medical events: one that shows an example of a random error in epidemiological research, and one that shows an example of a systematic error in epidemiological research? For each article, suggest how the error might have been controlled with methodology. Is one type of error necessarily "better" than the other? In other words, does a researcher hope for more random or systematic errors? Why?