Table 2.
Tukey HSD results for Chennai station showing the difference between groups
| LP 1 | LP 2 | LP 3 | LP 4 | UP 1 | UP 2 | UP 3 | UP 4 | UP 5 | UP 6 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | PL | 0.57 | 3.67 | 2.6 | 5.89 | 2.53 | 3.03 | 8.49 | 2.5 | 20.17# | 21.76# |
| LP 1 | 0 | 4.23 | 3.17 | 5.32 | 1.96 | 2.46 | 7.92 | 1.94 | 19.6# | 21.2# | |
| LP 2 | 0 | 1.07 | 9.56 | 6.2 | 6.69 | 12.15 | 6.17 | 23.84# | 25.43# | ||
| LP 3 | 0 | 8.49 | 5.13 | 5.63 | 11.09 | 5.1 | 22.77# | 24.36# | |||
| LP 4 | 0 | 3.36 | 2.86 | 2.6 | 3.39 | 14.28 | 15.87# | ||||
| UP 1 | 0 | 0.5 | 5.96 | 0.027 | 17.64# | 19.23# | |||||
| UP 2 | 0 | 5.46 | 0.52 | 17.14# | 18.74# | ||||||
| UP 3 | 0 | 5.98 | 11.68 | 13.28# | |||||||
| UP 4 | 0 | 17.67# | 19.26# | ||||||||
| UP 5 | 0 | 1.59 | |||||||||
| PM10 | PL | 30.78 | 104.84# | 77.08# | 31.41 | 3.77 | 1.75 | 9.61 | 0.62 | 20.43 | 18.22 |
| LP 1 | 0 | 74.06# | 46.3# | 0.63 | 27.01 | 29.03 | 21.17 | 30.15 | 10.35 | 12.56 | |
| LP 2 | 0 | 27.76 | 73.43* | 101.07* | 103.09* | 95.23* | 104.22* | 84.42* | 86.62* | ||
| LP 3 | 0 | 45.67* | 73.31* | 75.33* | 67.47* | 76.45* | 56.65* | 58.86* | |||
| LP 4 | 0 | 27.64 | 29.66 | 21.8 | 30.79 | 10.99 | 13.19 | ||||
| UP 1 | 0 | 2.02 | 5.84 | 3.15 | 16.65 | 14.45 | |||||
| UP 2 | 0 | 7.86 | 1.12 | 18.68 | 16.47 | ||||||
| UP 3 | 0 | 8.98 | 10.82 | 8.61 | |||||||
| UP 4 | 0 | 19.8 | 17.6 | ||||||||
| UP 5 | 0 | 2.2 | |||||||||
| NO2 | PL | 4.22 | 1.62 | 3.08 | 4.64 | 4.4 | 3.69 | 3.37 | 2.05 | 2.66 | 1.28 |
| LP 1 | 0 | 2.6 | 1.14 | 8.86# | 8.61# | 7.91# | 7.59# | 2.17 | 1.56 | 2.94 | |
| LP 2 | 0 | 1.46 | 6.26 | 6.01# | 5.3 | 4.99 | 0.44 | 1.05 | 0.34 | ||
| LP 3 | 0 | 7.72# | 7.47# | 6.76# | 6.45# | 1.03 | 0.42 | 1.8 | |||
| LP 4 | 0 | 0.25 | 0.96 | 1.27 | 6.69* | 7.3* | 5.92 | ||||
| UP 1 | 0 | 0.71 | 1.02 | 6.45* | 7.06* | 5.68* | |||||
| UP 2 | 0 | 0.31 | 5.74* | 6.35* | 4.97* | ||||||
| UP 3 | 0 | 5.43* | 6.04* | 4.65 | |||||||
| UP 4 | 0 | 0.61 | 0.77 | ||||||||
| UP 5 | 0 | 1.38 | |||||||||
| SO2 | PL | 0.6 | 0.52 | 0.4 | 0.22 | 0.27 | 2.39* | 3.2* | 3.18* | 3.32* | 1.44 |
| LP 1 | 0 | 0.086 | 0.2 | 0.38 | 0.34 | 1.79* | 2.6* | 2.57* | 2.72* | 2.04# | |
| LP 2 | 0 | 0.12 | 0.29 | 0.25 | 1.87* | 2.68* | 2.66* | 2.8* | 1.96# | ||
| LP 3 | 0 | 0.17 | 0.13 | 1.99* | 2.8* | 2.78* | 2.92* | 1.84# | |||
| LP 4 | 0 | 0.041 | 2.16* | 2.97* | 2.95* | 3.1* | 1.67 | ||||
| UP 1 | 0 | 2.12* | 2.93* | 2.91* | 3.06* | 1.71# | |||||
| UP 2 | 0 | 0.81 | 0.79 | 0.93 | 3.83# | ||||||
| UP 3 | 0 | 0.023 | 0.12 | 4.64# | |||||||
| UP 4 | 0 | 0.14 | 4.62# | ||||||||
| UP 5 | 0 | 4.76# | |||||||||
*Significant decrease in time phase in row with respect to time phase in the column
#Significant increase in time phase in row with respect to time phase in the column
PL, pre-lockdown phase
LP, lockdown phases
UP, unlock phases