Table 5.
Group Differences among Half-lives of Radon Exhalation from Hwangtohs
| Production area / Manufacturing company | Overall Avg.in chamber. (pCi/L) | Half-live (mean± SD)1st~5th, T-mean | MinMax | F-test | P-Value | Group difference |
| A Province | 6.3 | 1st | 2.6696±1.4340 | .0011.00 | 111.527 | .000 | A<B<C,D,E |
| 2nd | 6.1565±1.2305 |
| 3rd | 7.1630±1.2565 |
| 4th | 7.5283±1.5200 |
| 5th | 7.7522±1.2608 |
| Tm | 6.2539±2.3031 |
| B Province | 7.2 | 1st | 3.1696±1.7194 | .4012.10 | 117.810 | .000 | A<B<C,D,E |
| 2nd | 7.1196±1.6084 |
| 3rd | 8.2239±1.2162 |
| 4th | 8.7022±1.3121 |
| 5th | 8.8130±1.4389 |
| Tm | 7.2057±2.5644 |
| C Province | 5.7 | 1st | 2.6022±1.4310 | .6011.00 | 97.676 | .000 | A<B<C,D,E |
| 2nd | 5.4413±1.2710 |
| 3rd | 6.4304±1.3293 |
| 4th | 7.0043±1.2176 |
| 5th | 7.2261±1.2073 |
| Tm | 5.7409±2.1216 |
| D Province | 11.7 | 1st | 5.1630±1.4310 | .4019.00 | 175.621 | .000 | A<B<C<D,E |
| 2nd | 5.4413±1.6834 |
| 3rd | 13.278±1.8693 |
| 4th | 14.689±2.0253 |
| 5th | 14.854±1.8772 |
| Tm | 11.672±4.1794 |