What is Sample Size?
Sample size is the number of participants or observations included in a study. It directly affects how accurate and reliable your results will be.
Why It’s Important
- A small sample may lead to unreliable conclusions.
- A large sample provides more accurate results but increases cost and time.
- Choosing the right sample size ensures valid statistical outcomes.
How to Calculate Sample Size
- Based on population size, confidence level, and margin of error.
- Statistical tools or software like SPSS or online calculators are used for estimation.
Summary
An appropriate sample size ensures your results are trustworthy, representative, and statistically valid. It’s one of the most important planning decisions in research design.