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Research Methodology

What is Sample Size? Understanding its Role, Calculation & Impact on Research Accuracy

Learn what sample size means in research. Understand how it affects accuracy, confidence levels, and statistical power, and explore how to calculate an ideal sample size for valid results.

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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.

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