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Pooled Two-Sample Degrees of Freedom Calculator — result sheet
Calculate the pooled degrees of freedom for an independent two-sample comparison.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Pooled degrees of freedom=n₁+n₂−2.
The result is the conventional degrees-of-freedom count for a pooled independent two-sample mean comparison.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Group 1 sample size — minimum 2; maximum 1000000000
- Group 2 sample size — minimum 2; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Group 1 sample size | 20 |
| Group 2 sample size | 18 |
Pooled degrees of freedom =36.
Assumptions and limits
- Both groups have at least two observations and the independent pooled comparison is the intended method.
- The formula is a design quantity, not a p-value or effect estimate.
- Unequal-variance Welch degrees of freedom and study design are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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