Table 1 Mean day and night statistical aggregates for Lombardy obtained from the multiyear geographical mean, minimum and maximum values of HRI of the commuting areas

Day

Min

0.001% (0.0006–0.003)

0.01% (0.0–0.003)

0.004% (0.003–0.004)

Mean

0.76% (0.38–1.52)

1.23% (0.0–2.46)

2.32% (1.74–2.61)

Max

3.29% (1.64–6.58)

6.4% (0.0–12.76)

11.31% (8.48–12.72)

Night

Min

0.001% (0.0006–0.003)

0.002% (0.0–0.003)

0.004% (0.003–0.004)

Mean

0.87% (0.44–1.75)

1.32% (0.0–2.65)

2.34% (1.75–2.63)

Max

3.88% (1.94–7.76)

6.91% (0.0–13.82)

11.46% (8.59–12.89)

p-value

0.0001*

0.0033*

0.56*

H₀ rejected

H₀ rejected

H₀ can’t be rejected