Pollutants

Mean (± s.e)

min

max

O₃

71.776 ± 0.726

67.82

76.92

CO

19.145 ± 0.275

17.741

21.279

NO₂

28.145 ± 0.965

23.46

36.75

PM₁₀

48.400 ± 0.197

47.428

49.47

PM_2.5

29.676 ± 0.352

27.342

31.898

SO₂

36.913 ± 0.378

34.39

38.38

Control (Eleme Jnc.)

O₃

34.158 ± 0.047

33.86

34.44

CO

12.218 ± 0.0473

11.88

12.47

NO₂

22.467 ± 0.158

21.59

23.51

PM₁₀

28.111 ± 0.035

27.95

28.34

PM_2.5

21.550 ± 0.170

20.7

22.37

SO₂

31.464 ± 0.1664

30.2

32.31

2-group Hotelling’s T-squared = 32,300.177

F test statistic: ((24-6-1)/(24-2)(6)) x 32,300.177 = 4,159.871

H₀: Vectors of means are equal for the two groups

F(6,17) = 4,159.871, Prob. > F(6,17) = 0.000