| Tabulation of Results | ||
| pre x post | ||
| 0 | 1 | 0 | 7 | 13 | 1 | 1 | 12 |
| Tabulation of Expected Results | ||
| pre x post | ||
| 0 | 1 | 0 | 4.85 | 15.15 | 1 | 3.15 | 9.85 |
| Statistical Results | |
| Pearson's Chi-squared test with Yates' continuity correction | |
| Pearson Chi Square Statistic | 1.88 |
| Degrees of Freedom | 1 |
| P value | 0.17 |
