Confidence Interval Calculator
confidence_interval_calculatorRead-onlyIdempotent
Confidence intervals for a mean (t or z) or a proportion (Wald and Wilson) at 80–99.9% confidence – margin of error, critical value and every step shown. Web page: https://calcbright.com/confidence-interval-calculator
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| n | No | Sample size (n) | |
| x | No | Successes (x) | |
| sd | No | Sample SD (s) | |
| conf | No | Confidence level | 95 |
| mean | No | Sample mean (x̄) | |
| type | No | Interval for | mean-t |