Table 1 Exploratory analysis. Adjustment to statistical normality of the variables

CR

Particles 0.3µ

1.00

2.26

0.09 ^NS

.515

(N = 74)

Particles 0.5µ

0.49

0.49

0.06 ^NS

.927

Particles 1µ

0.64

0.18

0.08 ^NS

.668

Particles 2.5µ

0.72

1.92

0.09 ^NS

.524

Particles 5µ

0.27

 − 0.08

0.11 ^NS

.288

Particles 10µ

0.65

0.47

0.22**

.002

Temperature (ºC)

 − 0.35

 − 1.30

0.27**

.000

Relative humidity (%)

0.67

 − 0.76

0.17 *

.025

AR

Particles 0.3µ

0.45

 − 0.43

0.08 ^NS

.549

(N = 98)

Particles 0.5µ

1.20

1.05

0.12 ^NS

.101

Particles 1µ

1.29

1.20

0.16 *

.010

Particles 2.5µ

1.28

0.91

0.18**

.003

Particles 5µ

1.42

2.55

0.14 *

.042

Particles 10µ

1.95

5.19

0.16 *

.013

Temperature (ºC)

 − 0.09

 − 0.16

0.15 *

.019

Relative humidity (%)

 − 0.84

 − 0.18

0.20 ^NS

.001

BR

Particles 0.3µ

0.32

 − 0.52

0.07 ^NS

.696

(N = 98)

Particles 0.5µ

0.75

0.21

0.10 ^NS

.274

Particles 1µ

0.78

 − 0.09

0.13 ^NS

.062

Particles 2.5µ

0.94

0.43

0.13 ^NS

.083

Particles 5µ

1.04

0.42

0.14 ^NS

.052

Particles 10µ

1.09

0.36

0.15 *

.019

Temperature (ºC)

 − 0.02

 − 0.40

0.15 *

.024

Relative humidity (%)

 − 0.81

 − 0.09

0.19**

.001