I have been struggling with how you solve the first part of the question, as when I put the values for household size in order, I end up with the median as 3, but the mark scheme says that 2 is the answer for the median. Because of this, I do not understand how you can calculate the upper and lower quartiles. I know I have gone wrong somewhere in my reasoning, as Statistics is my weakest subject. (If you could recommend some useful A Level Statistics resources, please let me know).
Any help would be appreciated.