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Table 2 Mean day and night statistical aggregates for Lombardy obtained from the multiyear geographical mean, minimum and maximum values of HB of the commuting areas in Lombardy

From: Long-term exposure and health risk assessment from air pollution: impact of regional scale mobility

 

NO2

O3

PM2.5

Day

Min

0.0

0.0

0.0

Mean

20.0

26.7

53.8

Max

156.5

271.5

465.9

Night

Min

0.0

0.0

0.0

Mean

20.7

26.6

49.8

Max

239.9

382.9

625.4

p-value

 

0. 38*

0.51*

0.76*

 

H0 can’t be rejected

H0 can’t be rejected

H0 can’t be rejected

  1. In the last two rows the results from the T-test when comparing the HRI obtained for the DAY and the NIGHT scenarios
  2. *One-tailed T-test with null hypothesis H0: µ ≥ µ0. The mean daily HB is equal to or greater than the mean night HB