| Testing Mean with known Variance | |
| sample size | 63 |
| population variance | 0.87 |
| sample mean | 21.16 |
| null hypothesis about mean | 0 |
| type I error | 0.65 |
| critical value (one-tailed) | 0.0452805224243368 |
| confidence interval (two-tailed) (sample mean) | [ 21.1066766216213 , 21.2133233783787 ] |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |