Free Biostatistics Resources & Tools
Plan your study, organize your data, and write a clearer report with free tools, practical guides, and downloadable worksheets.
Choose a research stage to find matching guides and downloads. For interactive calculators and planning aids, browse the Research Workbench. For questions to investigate, read the research briefs.
Start with These Resources
Sample-Size Planning Calculator
Offline planning approximations for independent means or proportions and one-sample comparisons with a fixed reference. Includes alpha, power, allocation ratio and expected loss; excludes crossover and non-inferiority designs.
Statistical Analysis Plan (SAP) Template
An editable drafting template with study-specific prompts for estimands, analyses, missing data, and reporting. Requires completion and statistical review before use.
CONSORT Checklist for RCTs
The CONSORT 2025 checklist for reporting randomized trials. Use alongside the full statement, applicable extensions, and your journal’s instructions.
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Sample-Size Planning Calculator
Offline planning approximations for independent means or proportions and one-sample comparisons with a fixed reference. Includes alpha, power, allocation ratio and expected loss; excludes crossover and non-inferiority designs.
Statistical Analysis Plan (SAP) Template
An editable drafting template with study-specific prompts for estimands, analyses, missing data, and reporting. Requires completion and statistical review before use.
CONSORT Checklist for RCTs
The CONSORT 2025 checklist for reporting randomized trials. Use alongside the full statement, applicable extensions, and your journal’s instructions.
Audit a Research Data Dictionary Before Analysis
Match each dataset column to a clear definition, value labels, missing-value rules, and a traceable derivation.
Summarize an Ordinal Scale Without Hiding Its Categories
Preserve ordered response labels, denominators, and scoring rules when describing ordinal research outcomes.
Check Expected Counts Before a Contingency-Table Test
Audit category counts, independence, and sparse cells before interpreting a categorical association test.
Audit Two-Rater Agreement Before Reporting Kappa
Build a labeled agreement table and interpret Cohen’s kappa alongside observed agreement and category frequencies.
Use Discordant Pairs in an Exact McNemar Test
Preserve matched binary outcomes and separate directional change from overall agreement before testing.
Turn an Allocation Ratio into Transparent Group Counts
Separate group-count arithmetic, sample-size justification, and the randomization procedure when planning allocation.
Use Weight-Based Effective Sample Size as a Diagnostic
Inspect unequal weights without confusing a simple effective sample calculation with full survey-design precision.
Document a Reproducible Randomization Sequence Safely
Record generation settings and independent checks while preserving allocation concealment during enrollment.
Check Variable Names Without Silently Changing Their Meaning
Find duplicate, ambiguous, and incompatible column names before renaming research data fields.
External resources are maintained by their respective providers. Source-check dates are shown on external-resource entries; features and optional paid services may change. Our worksheets are planning aids, not validated instruments.