Hi all,

Im currently trying to revise for a maths skills test, and I'm looking at box and whisker diagrams. So far I've understood it, except one thing. I know the median is the middle value of a given data set, but what do you do if you are asked to draw a box and whisker diagram based on the following:

- The upper quartile

- The lower quartile

- The highest value

- The lowest value

How would you then work out (and apply to the diagram) the median? As I dont see any way of being able to tell how many values are in the data set, just from the information provided above.

I am looking at this website:

Box and whiskers diagram - Schools

Please explain this to me as I'm totally confused.

Thanks in advance!