An environmental scientist investigated air quality in an urban area. She selected a sample of 10 representative monitoring stations. At each station, she recorded the concentration of fine particulate matter (PM2.5PM_{2.5}PM2.5, measured in μg/m3\mu\text{g/m}^3μg/m3) under two different atmospheric conditions: Day A (stagnant air, high pressure) and Day B (windy, low pressure).
Table 2: PM2.5PM_{2.5}PM2.5 concentration (μg/m3\mu\text{g/m}^3μg/m3) at 10 monitoring stations on Day A and Day B
| Monitoring Station | Day A (Stagnant Air) | Day B (Windy) |
|---|---|---|
| 1 | 44 | 22 |
| 2 | 48 | 26 |
| 3 | 38 | 18 |
| 4 | 52 | 29 |
| 5 | 41 | 20 |
| 6 | 36 | 19 |
| 7 | 50 | 28 |
| 8 | 34 | 15 |
| 9 | 45 | 24 |
| 10 | 40 | 21 |
Explain one reason why the mean would be the most appropriate measure of central tendency to summarise the data in Table 2.
Practise AQA A Level Psychology Data handling and analysis with exam-style questions for A Level Psychology. 263 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
