I'm struggling to find the median of grouped data in a table.
I know that you need to find the median position. The problem I'm having is that one source tells me that to find the median position you need to do n/2, but another source - and an exam question that I tried - I need to do (n+1)/2. And then another source says you need to draw a cumulative frequency graph to find it.
I'm just confused. (n+1)/2 worked in the exam question, but I'm not sure why it didn't work on MyMaths example questions. Does it vary?