### Box-and-whisker plots

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Box-and-whisker plots A box-and-whicker plot is a diagram that shows the distribution of a set of data at a glance. They are drawn using five summary statistics: the lowest and highest values( the range), the first and third quartiles (The interquartile range) and the median. Drawing box-and-whisker plots All box-and-whisker plots have the same basic […]

### Making comparisons using averages and ranges

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Making comparisons using averages and ranges Having found a value to represent you data (an average) you can now compare two or more sets of data. However, just comparing the averages can sometimes be misleading. It can be helpful to know how consistent the data is and you for this by thinking about how spread […]