How it works
A large-population baseline sample size is related to a known finite population through an algebraic correction. This form solves for corrected sample size; enter the known quantities in Population size, Baseline sample size.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Population size | 1,000 | Formula symbol: population. Enter a numeric value. Use a whole number. Must be greater than zero. |
| Baseline sample size | 100 | Formula symbol: baseline. Enter a numeric value. Use a whole number. Must be greater than zero. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Population size
- 1,000
- Baseline sample size
- 100
Complete example results
- Corrected sample size
- 91
Reading the result
The result solves for corrected sample size from the entered quantities. Check the result unit and the formula conditions before using it.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
When can I use the corrected sample size result?
This is a without-replacement simple-random-sampling planning relation; population size is not inferred from observed data. Count solutions round up and can differ slightly from exact equality.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method sources: itl.nist.gov