Addressing Selection Bias in Research
In a study examining the effects of school uniforms on student performance, which of the following is an ethical method for addressing selection bias when choosing participating schools?
A
Choosing only top-performing schools for more reliable data.
B
Including schools based on proximity to reduce travel costs and time.
C
Selecting schools that have already expressed interest in the study.
D
Randomly selecting schools from different socioeconomic areas.
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