Table 2.
Results of Chi-square test of respirators from brand B
| Mask |
Sodium chloride solution |
df | Chi-square statistic | Asymptotic significance | Hypothesis |
|---|---|---|---|---|---|
| (Treatment) | [μS/cm] | ||||
| FFP1 (untreated) | 100 | 6 | 20.031 | 0.003 | H1 |
| FFP1 (treated) | 100 | 7 | 0.87 | 0.997 | H0 |
| FFP2 (untreated) | 100 | 5 | 10.824 | 0.055 | H0 |
| FFP2 (treated) | 100 | 7 | 0.594 | 0.999 | H0 |
| FFP3 (untreated) | 100 | 3 | 0.531 | 0.912 | H0 |
| FFP3 (treated) | 100 | 7 | 4.584 | 0.711 | H0 |
| FFP1 (untreated) | 50 | 6 | 156.648 | 0.000 | H1 |
| FFP1 (treated) | 50 | 7 | 121.681 | 0.000 | H1 |
| FFP2 (untreated) | 50 | 5 | 5.258 | 0.385 | H0 |
| FFP2 (treated) | 50 | 7 | 0.114 | 1.000 | H0 |
| FFP3 (untreated) | 50 | 3 | 2.176 | 0.537 | H0 |
| FFP3 (treated) | 50 | 7 | 0.675 | 0.999 | H0 |
FFP, filtering facepiece.