An environmental scientist investigated air quality at different locations in a city. Daily average $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) were recorded at two sites: an "Urban Roadside" monitoring station and an "Urban Park" station. The table below shows the $PM2.5\text{PM}_{2.5}$ readings for each day at both sites.

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations

Urban Roadside station		Urban Park station
Day	$PM2.5\text{PM}_{2.5}$ concentration	Day	$PM2.5\text{PM}_{2.5}$ concentration
1	24	10	8
2	28	11	6
3	22	12	9
4	31	13	7
5	25	14	8
6	29	15	5
7	20	16	10
8	26	17	7
9	27	18	9
		19	8
		20	8

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations

Urban Roadside station		Urban Park station
Day	$PM2.5\text{PM}_{2.5}$ concentration	Day	$PM2.5\text{PM}_{2.5}$ concentration
1	24	10	8
2	28	11	6
3	22	12	9
4	31	13	7
5	25	14	8
6	29	15	5
7	20	16	10
8	26	17	7
9	27	18	9
		19	8
		20	8

Data handling and analysis

Question 17

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations

Markscheme

Data handling and analysis

Question 17

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations

Markscheme

Data handling and analysis

Question 17

Table 1: Daily PM2.5\text{PM}_{2.5}PM2.5​ concentrations (μg/m3\mu\text{g/m}^3μg/m3) at the Urban Roadside and Urban Park stations

Data handling and analysis Questions

Data handling and analysis

Question 17

Table 1: Daily PM2.5\text{PM}_{2.5}PM2.5​ concentrations (μg/m3\mu\text{g/m}^3μg/m3) at the Urban Roadside and Urban Park stations

Data handling and analysis Questions

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations

Table 1: Daily $PM2.5\text{PM}_{2.5}$ concentrations ( $μg/m3\mu\text{g/m}^3$ ) at the Urban Roadside and Urban Park stations