I have a set of data (positive real numbers < 1) in five categories. My aim is to show that the data in the last category is bigger than the other categories for a range of examples (the data set), but the last category isn't necessarily more important than the others.
I thought the best thing is to average each category and then plot the graph of it which works. But I feel this is too simple and is it good if I look at the standard deviation of each category to show that there isn't too much difference and the average-taking is valid?
Also, I was going to use a scatter plot, is this OK? What would you recommend?