Table 3.
Correlation between dependent variables and independent variables.
| Formaldehyde concentration (μg/m3) | Temperature (°C) | Academic qualification | Years of working experience | Age of facility | Number of services | Average number of customers in a week | |
|---|---|---|---|---|---|---|---|
| Formaldehyde concentration (μg/m3) | 1 | — | — | — | — | — | — |
| Temperature (°C) | 0.307∗∗ | 1 | — | — | — | — | — |
| Academic qualification | 0.087 | 0.156 | 1 | — | — | — | — |
| Years of working experience | 0.314∗∗ | 0.229∗ | 0.075 | 1 | — | — | — |
| Age of facility | 0.418∗∗ | 0.082 | −0.062 | 0.353∗∗ | 1 | — | — |
| Number of services | 0.315∗∗ | 0.180 | 0.383∗∗ | −0.004 | 0.036 | 1 | — |
| Average number of customers in a week | 0.545∗∗ | 0.231∗ | 0.289∗ | 0.439∗∗ | 0.203 | 0.206 | 1 |
∗∗Correlation is significant at the 0.01 level (1-tailed). ∗Correlation is significant at the 0.05 level (1-tailed).