Table 3.
Comparison of wood versus metal using Chi-squared test
| Material | Contaminated tiles (n) | Total tiles (n) | Contamination (%) |
|---|---|---|---|
| Wood | 3 | 29 | 10.3 |
| Metal | 9 | 29 | 30.1 |
SE = 10.3; 95% CI = 0.6–40.8; P = 0.046
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