Table 3.
Summary statistics for Three-Way Analysis of Variance (balanced design, no interactions) comparing the effects of wastewater treatment plant (WWTP), storage time, and storage temperature as independent variables and pooled quantified viral RNA copy number as the dependent variable. Results for both N and PMMoV are presented below, where statistical significance was set at α = 0.05, n = 72.
| Viral RNA target | Independent variable | F-statistic | P-value |
|---|---|---|---|
| N | WWTP (6 plants) | 20.352 | <0.001 |
| Storage time (7-day and 14-day) | 3.134 | 0.088 | |
| Storage temperature (4 °C, −20 °C, −80 °C) | 10.278 | <0.001 | |
| PMMoV | WWTP (6 plants) | 12.395 | <0.001 |
| Storage time (7-day and 14-day) | 26.377 | <0.001 | |
| Storage temperature (4 °C, −20 °C, −80 °C) | 2.628 | 0.091 |