Z-based two-sided interval around the mean.
Last Updated: 07 Jan 2026
Z critical: 1.645
Interval: 46.395986 to 53.604014
Confidence Interval Estimator helps you z-based two-sided interval around the mean. It is commonly used by students, analysts, educators for confidence interval, z critical, statistics interval calculator.
Estimate the Interval for a Mean
This calculator uses a two-sided Z critical value (common confidence levels) and computes:
- Margin of error
- Low and high interval bounds