| Hypothesis Test about the Mean - Confidence Interval | |
| Sample size | 278 |
| Sample standard deviation | 5.11845122773262 |
| Confidence | 0.95 |
| Null hypothesis | 15 |
| Sample Mean | 19.9964028776978 |
| 2-sided Confidence Interval | [ 19.3920843060769 , 20.6007214493188 ] |
| Left-sided Confidence Interval | [ 19.4897642227849 , +inf ] |
| Right-sided Confidence Interval | [ -inf, 20.5030415326108 ] |