| Testing Mean with known Variance | |
| sample size | 98 |
| population variance | 12.8979591836735 |
| sample mean | 2 |
| null hypothesis about mean | 20 |
| type I error | 0.05 |
| critical value (one-tailed) | 19.4032743336991 |
| confidence interval (two-tailed) (sample mean) | [ 1.28895751242741 , 2.71104248757259 ] |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |