Confidence Interval for Mean (Z)
Use this calculator to compute the confidence interval for population mean when the population standard deviation is known.
| Confidence Interval Calculator for mean | |
|---|---|
| Sample Size ($n$) | |
| Sample Mean ($\overline{x}$) | |
| Population Standard Deviation ($\sigma$) | |
| Confidence Level ($1-\alpha$) | |
| Results | |
| Standard Error of Mean: | |
| Z Critical Value : ($Z$) | |
| Margin of Error: ($E$) | |
| Lower Confidence Limits: | |
| Upper Confidence Limits: | |
