| Testing Population Mean with known Variance | ||
| Population variance | 0.36 | |
| Sample size | 63 | |
| Sample mean | 20 | |
| Confidence interval | 1 | |
| Type of Interval | Left tail | Right tail |
| Two-sided confidence interval at 1 | -Inf | Inf |
| Left one-sided confidence interval at 1 | -Inf | +inf |
| Right one-sided confidence interval at 1 | -inf | Inf |
| more information about confidence interval | ||