SciExpert service
Sample Size Calculation
Know exactly how many participants your study needs
Determine the number of participants needed to detect a meaningful effect with statistical confidence, so you neither waste resources nor end up underpowered. Run it self-serve in the workspace or hand it to a verified expert.
- • Power analysis for RCTs, cross-sectional, case-control and cohort designs
- • Sample size for hypothesis tests, confidence intervals and equivalence / non-inferiority
- • Attrition adjustments, clustered designs and multiple comparison corrections
- • Written justification paragraph you can paste into a protocol or thesis
How to use Sample Size Calculation
Before you begin: A signed-in SciExpert account
- 1
Open Sample Size Calculation
From the workspace sidebar choose Sample Size Calculation. On a phone, open the All menu and tap Sample Size Calculation.
- 2
Set up your inputs
Determine the number of participants needed to detect a meaningful effect with statistical confidence, so you neither waste resources nor end up underpowered. Run it self-serve in the workspace or hand it to a verified expert. Start with the smallest realistic input so you can check the output before scaling up.
- 3
Run it
Run the tool and check the first output: power analysis for rcts, cross-sectional, case-control and cohort designs.
- 4
Review what came back
Work through the results: sample size for hypothesis tests, confidence intervals and equivalence / non-inferiority; attrition adjustments, clustered designs and multiple comparison corrections; written justification paragraph you can paste into a protocol or thesis.
- 5
Save or export
Use the save, copy or export options available in this service. Review the output before including it in a manuscript or sharing it with collaborators.