Stem and leaf: we partition each measurement into two parts. The first part is called the stem, the second is called the leaf. The stem consists of one or more of the initial digits of the measurement, the leaf is composed of one or more of the remaining digits. All the partitioned numbers are shown together in a single display; the stems form an ordered column with the smallest stem at the top and the largest at the bottom. We include in the stem column all stems within the range of the data even when a measurement with that stem is not in the data set. The rows of display contain the leaves, ordered and listed to the right of their respective stems. When leaves consist of more than one digit, all digits after the first may be deleted. Decimal when present in data is omitted in the stem and leaf display. The stems are separated from their leaves by a vertical line.
An advantage of it over histogram is that it preserves the information contained in the individual measurements.
Are most effective with relatively small data sets
PSM / COMMUNITY MEDICINE by Dr Abhishek Jaiswal is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Based on a work at learnpsm@blogspot.com.
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