Displaying “+£n vs avg” is cool. I like it.
Averages are good, helpful and easy to understand yet I feel they can be a little misleading.
You spend £10 in Starbucks and later that month you spend £100 (it’s been a really tough day in the office and you really need your coffee and cake fix!).
Your average spend for Starbucks is £55. Is that meaningful? Maybe.
What if you displayed a simple box plot?
While it might seem like way too much information to digest I have a hunch it would be really useful.
It feels like your awesome designers could work out a way to represent the data in a way that’s not too heavy going and super easy to digest.
I think it would be better than average.
What do you think?