What are the disadvantages of systematic sampling?

What are the disadvantages of systematic sampling?

Systematic sampling can introduce bias if there's a hidden pattern in the population. For example, if you sample every 10th person and they all belong to a specific group, your sample may not be representative.

Can you give me an example of how bias might occur?

Sure! Imagine a population where every 5th person is a senior citizen. If you sample every 5th person, your sample will over-represent seniors, leading to skewed results.

Are there any other limitations I should be aware of?

Yes, systematic sampling can be less flexible than other methods. If the population size changes or if you need to adjust your sample, it can be challenging.

How does it compare to random sampling?

Random sampling is generally more reliable for avoiding bias, as every individual has an equal chance of being selected, unlike systematic sampling which can inadvertently favor certain groups.