| Testing Mean with known Variance | |
| sample size | 12 |
| population variance | 7.9361466873051 |
| sample mean | 81.733333333333 |
| null hypothesis about mean | 100 |
| type I error | 0.05 |
| critical value (one-tailed) | 98.6623531320331 |
| confidence interval (two-tailed) (sample mean) | [ 80.1394287801923 , 83.3272378864737 ] |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |