| Testing Mean with known Variance | |
| sample size | 9 |
| population variance | 0.36 |
| sample mean | 20.285714 |
| null hypothesis about mean | 21 |
| type I error | 0.05 |
| Z-value | -3.57143000000001 |
| p-value (one-tailed) | 0.999822481278073 |
| p-value (two-tailed) | 1.99964496255615 |
| conclusion for one-tailed test | |
| Do not reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Do not reject the null hypothesis | |