| Testing Mean with known Variance | |
| sample size | 63 |
| population variance | 13.5621063240111 |
| sample mean | 2 |
| null hypothesis about mean | 20 |
| type I error | 0.05 |
| critical value (one-tailed) | 19.2368312925632 |
| confidence interval (two-tailed) (sample mean) | [ 1.09062839623226 , 2.90937160376774 ] |
| conclusion for one-tailed test | |
| Reject the null hypothesis. | |
| conclusion for two-tailed test | |
| Reject the null hypothesis | |