What are some effective methods to reduce selection bias in research?

What are some effective methods to reduce selection bias in research?

There are several methods to reduce selection bias, including random sampling, stratification, and using control groups.

Can you explain how random sampling helps in reducing selection bias?

Random sampling ensures that every individual has an equal chance of being selected, which helps create a representative sample.

What is stratification and how does it work?

Stratification involves dividing the population into subgroups and sampling from each subgroup to ensure all are represented.

Are there any statistical techniques to adjust for selection bias?

Yes, techniques like propensity score matching and regression adjustment can help control for selection bias in analysis.