Table 2.
Descriptive (Summary) Statistics Comparison Between the AQY1 Monitors and the Reference (Hinton) Monitor. Results by Device ID may be more meaningful.
| Ozone | |||||||
|---|---|---|---|---|---|---|---|
| Data Set | O3 Raw AQY1 Data (ppb) | O3 Calibrated AQY1 Data (ppb) | O3 Reference Monitor (Hinton) Data (ppb) | O3 Reference Monitor (Hinton) Data—O3 Raw AQY1 Data (Absolute Difference) | O3 Reference Monitor (Hinton) Data—O3 Raw AQY1 Data (Difference in %) | O3 Reference Monitor (Hinton) Data—O3 Calibrated AQY1 Data (Absolute Difference) | O3 Reference Monitor (Hinton) Data—O3 Calibrated AQY1 Data (Difference in %) |
| Number of records | 163,584 | 163,584 | 136,632 | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Missing records (%) | 31,382 (19.2%) | 74,322 (45%) | 955 (7%) | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Minimum | 0 | 0 | 0 | 0 | Not Applicable | 0 | Not Applicable |
| 1st Quartile | 23.5 | 19.6 | 16 | −7.5 | −47% | −3.4 | −21% |
| Median | 33.1 | 31.3 | 27 | −6.1 | −23% | −4.3 | −16% |
| Mean | 35 | 32.7 | 27.2 | −7.8 | −29% | −5.2 | −19% |
| 3rd Quartile | 44.6 | 43.9 | 38 | −6.6 | −17% | −5.6 | −15% |
| Maximum | 121 | 138.7 | 85 | −36 | −42% | −53.7 | −63% |
| Nitrogen Dioxide | |||||||
| Data Set | NO2 Raw AQY1 Data (ppb) | NO2 Calibrated AQY1 Data (ppb) | NO2 Reference Monitor (Hinton) Data (ppb) | NO2 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Absolute Difference) | NO2 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Difference in %) | NO2 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Absolute Difference) | NO2 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Difference in %) |
| Number of records | 163,584 | 163,584 | 136,632 | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Missing records (%) | 31,382 (19.2%) | 67,772 (41%) | 3026 (22%) | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Minimum | −109.0 | 0.0 | 0.0 | 109 | Not Applicable | 0.0 | 0% |
| 1st Quartile | −11.0 | 0.0 | 2.8 | 13.8 | 493% | 2.8 | 100% |
| Median | −2.4 | 0.0 | 4.8 | 7.2 | 150% | 4.8 | 100% |
| Mean | −3.4 | 5.6 | 7.3 | 10.7 | 147% | 1.7 | 23% |
| 3rd Quartile | 6.6 | 5.5 | 8.8 | 2.2 | 25% | 3.3 | 38% |
| Maximum | 208.5 | 110.9 | 45.7 | −162.8 | −356% | −65.2 | −143% |
| Particulate Matter with a Diameter Less than 2.5 μm | |||||||
| Data Set | PM2.5 Raw AQY1 Data (ug/m3) | PM2.5 Calibrated AQY1 Data (ug/m3) | PM2.5 Reference Monitor (Hinton) Data (ug/m3) | PM2.5 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Absolute Difference) | PM2.5 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Difference in %) | PM2.5 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Absolute Difference) | PM2.5 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Difference in %) |
| Number of records | 163,584 | 163,584 | 136,632 | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Missing records (%) | 24,677 (15%) | 62,269 (38%) | 241 (0.18%) | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Minimum | 0 | 0 | 0 | 0 | Not Applicable | 0 | Not Applicable |
| 1st Quartile | 1.8 | 2.7 | 4.2 | 2.4 | 57% | 1.5 | 36% |
| Median | 3.1 | 7.7 | 8 | 4.9 | 61% | 0.3 | 4% |
| Mean | 4.3 | 11.2 | 9 | 4.7 | 52% | −2.2 | −24% |
| 3rd Quartile | 5.3 | 15.6 | 12.2 | 6.9 | 57% | −3.4 | −28% |
| Maximum | 866.7 | 156.2 | 77 | −789.7 | −1026% | −79.2 | −103% |
| Particulate Matter with a Diameter Less than 10 μm | |||||||
| Data Set | PM10 Raw AQY1 Data (ug/m3) | PM10 Calibrated AQY1 Data (ug/m3) | PM10 Reference Monitor (Hinton) Data (ug/m3) | PM10 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Absolute Difference) | PM10 Reference Monitor (Hinton) Data—NO2 Raw AQY1 Data (Difference in %) | PM10 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Absolute Difference) | PM10 Reference Monitor (Hinton) Data—NO2 Calibrated AQY1 Data (Difference in %) |
| Number of records | 163,584 | 163,584 | 136,632 | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Missing records (%) | 34,883 (21%) | 68,098 (42%) | 321 (2.4%) | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Minimum | 0 | 0 | 0 | 0 | Not Applicable | 0 | 0% |
| 1st Quartile | 3.5 | 7 | 11 | 7.5 | 68% | 4 | 36% |
| Median | 5.6 | 17.5 | 18 | 12.4 | 69% | 0.5 | 3% |
| Mean | 7.24 | 23.14 | 20.83 | 13.59 | 65% | −2.31 | −11% |
| 3rd Quartile | 8.7 | 31.9 | 27 | 18.3 | 68% | −4.8 | −18% |
| Maximum | 968.7 | 971.7 | 721 | −247.7 | −34% | −250.7 | −35% |