How to use Sample Size Calculation

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.

Before you start

• • A signed-in SciExpert account

Steps

1. 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. 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. 3

   Run it

   Run the tool and check the first output: power analysis for rcts, cross-sectional, case-control and cohort designs.

4. 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. 5

   Save or export

   Save the configuration as a preset if you will repeat it, and export the output when you need it outside SciExpert. Your inputs persist across refreshes and sign-ins.

Tips

• • Start with a small input, verify the output, then scale up.
• • Save a preset once the configuration works so you can reuse it across papers.

Troubleshooting