A method for presenting quantitative data in a graphical format, the stem and leaf plot functions as a visual representation of data distribution. It retains the original data points, unlike histograms, by separating each data value into two parts: the stem, which usually consists of the leading digit(s), and the leaf, representing the trailing digit(s). For instance, in the dataset {12, 15, 21, 23, 23, 38, 44}, if tens are used as stems and ones as leaves, 12 would be represented as a stem of ‘1’ and a leaf of ‘2’.
This approach offers a clear display of data concentration, spread, and outliers, allowing for quick identification of central tendencies and data range. Its simplicity makes it accessible for preliminary data analysis and communication, particularly in educational contexts. Historically, these diagrams were a foundational tool in exploratory data analysis, preceding the widespread availability of sophisticated statistical software, providing a readily understandable alternative for data visualization.
