| Testing Mean with known Variance | |
| sample size | 98 |
| population variance | 13 |
| sample mean | 20.29 |
| null hypothesis about mean | 20 |
| type I error | 0.05 |
| Z-value | 0.796231508661025 |
| p-value (one-tailed) | 0.212948743381087 |
| p-value (two-tailed) | 0.425897486762174 |
| conclusion for one-tailed test | |
| Do not reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Do not reject the null hypothesis | |