Table 2.

Description of the dataset pollution measurements.

	Ozone	Particulate Matter	Carbon Monoxide	Sulphur Dioxide	Nitrogen Dioxide
count	17568	17,568	17,568	17,568	17,568
mean	92.42	106.12	100.54	131.66	159.18
std	46.18	52.01	49.66	50.51	43.43
min	15	15	15	15	18
25%	54	60	56	99	134
50%	87	107	99	131	173
75%	127	146	138	177	193
max	215	215	215	215	215