Visualization methods enhance our understanding of sample data and help us make comparisons across samples. Box plots are a simple but powerful graphing tool that can be used in place of histograms to ...

Forbes contributors publish independent expert analyses and insights. I help people communicate data clearly with graphs. Last week’s post, “A Histogram is NOT a Bar Chart ”, explained that bar charts ...

This example shows how to create box plots and how to specify SYMBOL definitions so data outside the box-plot range can be represented with data points. It also shows how to change a box plot's ...

Figure 1: Data visualization with box plots. M.S. and J.W. conceived of the box plot tool, and M.S. developed the tool with input from all authors; J.W. implemented ...

Quartiles are the values that divide a data set into quarters: Put the values in order Divide the list into four equal parts The Quartiles are at the divisions The interquartile range shows the range ...