| Testing Mean with known Variance | |
| sample size | 105 |
| population variance | 0.25 |
| sample mean | 5.35 |
| null hypothesis about mean | 5.2 |
| type I error | 0.05 |
| critical value (one-tailed) | 5.28026063872658 |
| confidence interval (two-tailed) (sample mean) | [ 5.25436355022554 , 5.44563644977446 ] |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |