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95 Sigma is building an Arabic library of simple research tools and practical articles on statistical analysis, data analysis, academic research and AI tools.

Sample size calculator

Work out an initial sample size from your confidence level, margin of error and population size — and see what each choice does to the result.

Calculate your sample size, free

Need a calculation that depends on a study design or a more complex model? Send the details of your research for an assessment.

Send us your research title. We will help you see the whole statistical path.

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