| Testing Sample Mean with known Variance | ||
| Population variance | 13 | |
| Sample size | 9 | |
| Null hypothesis (H0) | 20 | |
| Confidence interval | 0.95 | |
| Type of Interval | Left tail | Right tail |
| Two-sided confidence interval at 0.95 | 17.6444164518927 | 22.3555835481073 |
| Left one-sided confidence interval at 0.95 | 18.0231319691312 | +inf |
| Right one-sided confidence interval at 0.95 | -inf | 21.9768680308688 |
| more information about confidence interval | ||