Table 2.
Summary statistics for repeated measurements made on different days and at different times of day during specific monitoring sessions.
| Sampling session | Location | Leq (dBA) | UFP (× 1000 p/cm3) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | CVa (%) | N | Mean | SD | CV (%) | ||||
| Chicago, December 2006 | A | 7 | 69.0 | 3.1 | 4.5 | 0 | - | - | - | ||
| B | 7 | 62.2 | 3.4 | 5.4 | 0 | - | - | - | |||
| Chicago, April 2007 | B | 5 | 62.5 | 1.5 | 2.3 | 5 | 37.0 | 21.3 | 57.6 | ||
| C | 4 | 71.6 | 0.4 | 0.5 | 4 | 36.8 | 23.0 | 62.3 | |||
| Riverside, April 2007 | A | 8 | 53.9 | 7.0 | 12.9 | 8 | 11.7 | 7.8 | 66.5 | ||
| B | 8 | 72.0 | 3.0 | 4.1 | 8 | 13.7 | 9.2 | 67.4 | |||
a
CV = coefficient of variation (SD/Mean).