For this, you'll need resources 4, 5 and 6
1. How many people were surveyed ? (1)
2. What do you know about the people who were surveyed ? (3)
Start with the obvious e.g. they were shopping in... (or were they ??)
3. What other information would you need to know about the survey to decide how reliable the results of the survey are ? (2)
First day of work experience tomorrow. Enjoy it !