| Testing Population Mean with known Variance | ||
| Population variance | 13 | |
| Sample size | 98 | |
| Sample mean | 20 | |
| Confidence interval | 0.65 | |
| Type of Interval | Left tail | Right tail |
| Two-sided confidence interval at 0.65 | 19.6596079262587 | 20.3403920737413 |
| Left one-sided confidence interval at 0.65 | 19.8596602444858 | +inf |
| Right one-sided confidence interval at 0.65 | -inf | 20.1403397555142 |
| more information about confidence interval | ||