Displaying and summarizing Quantitative Data - Stem-and-leaf-displays
3 important questions on Displaying and summarizing Quantitative Data - Stem-and-leaf-displays
When are stem-and-leaf displays useful?
When you make them by hand for batches of fewer than a few hundred data values. They are a quick way to display-and even to record- numbers.
What do you do with numbers with three or more digits?
You'll often decide to truncate (afknotten)(or round) the number to two places, using the first digit as the stem and the second as the leaf.
What is important in making a stem-and-leaf display?
Make sure to give each digit the same width, in order to preserve the area principle.
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