Plus Four Confidence Interval for Proportion
Use this calculator to compute the plus four confidence interval for population proportion.
| Confidence Interval Calculator for proportion | |
|---|---|
| Sample Size ($n$) | |
| Number of successes ($k$) | |
| Confidence Level ($1-\alpha$) | |
| Results | |
| Estimate of proportion: ($\hat{p}$) | |
| Standard Error of proportion: ($SE$) | |
| Z-critical value: ($Z_{\alpha/2}$) | |
| Margin of Error: ($E$) | |
| Lower Confidence Limits: | |
| Upper Confidence Limits: | |
