Table 2.
Comparison of wood versus plastic using Chi-squared test
| Material | Contaminated tiles (n) | Total tiles (n) | Contamination (%) |
|---|---|---|---|
| Wood | 3 | 29 | 10.3 |
| Plastic | 10 | 30 | 33.3 |
SE = 10.3; 95% CI = 28.0–43.2; P = 0.028
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.