Estimating a Proportion Calculator
Estimating a proportion is crucial in statistics and data analysis. It helps us make informed decisions based on sample data.
- Enter the numerator and denominator of the proportion you want to estimate.
- Enter the population size.
- Click ‘Calculate’.
The formula used here is: Estimated Proportion = (Numerator / Denominator) * (Population / Sample Size)
| Sample | Estimated Proportion | Confidence Interval |
|---|---|---|
| 100 | 0.45 | 0.38 – 0.52 |
| 200 | 0.51 | 0.45 – 0.57 |
- Always use a confidence level of 95% for most analyses.
- Ensure your sample size is representative of the population.
What is a proportion?
A proportion is a relationship between two quantities, expressed as a ratio.
For more information, see CDC’s guide to understanding statistics.