| Testing Mean with known Variance | |
| sample size | 99 |
| population variance | 13 |
| sample mean | 21.26 |
| null hypothesis about mean | 0 |
| type I error | 0.65 |
| Z-value | 58.6690669380775 |
| p-value (one-tailed) | 0 |
| p-value (two-tailed) | 0 |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |