If the notches of two groups do not overlap ... use a box plot to test any hypotheses or assumptions about your data, such as whether it follows a normal distribution. A symmetric data set ...

Consider Overlapping Boxes ... of the data , excluding the outliers. Imagine box plots as a way to understand and compare different sets of data. When comparing them, you want to focus on a ...

The information required to be able to draw a box plot is called the 'five-figure summary'. The oldest person in Mathsminster is 90. The youngest person is 15. The median age of the residents is ...