MATHS7025: You Have Been Provided with a File of Data Extracted From DEFRA’s Air Pollution Aarchives: Research Methods and Statistics Assignment, UoA, Singapore

THE PROBLEM

You have been provided with a file of data extracted from DEFRA’s air pollution archives. It shows PM_2.5 pollution levels in the centres of Leeds, and of York, during the winter of 2015/16. Despite being close together, these cities but have different characteristics and it is interesting to see how this affects the environment.

We will be looking in particular at the PM_2.5 levels;

1. To make the task manageable, you need to select a sample of 10 days and work out the average PM₅ levels at the two sites.
2. You will carry out a test to see if the difference between the sites is statistically significant.
3. You will investigate how well correlated are the PM₅ levels in the two cities? In other words, if the level in one city changes can we expect a similar change in the level in the other city?