EXAMPLE 6 Stemplot of the “65 and over” data

For the “65 and over” percentages in Table 11.1, the whole-number part of the observation is the stem, and the final digit (tenths) is the leaf. The Alabama entry, 13.8, has stem 13 and leaf 8. Stems can have as many digits as needed, but each leaf must consist of only a single digit. Figure 11.6 shows the steps in making a stemplot for the data in Table 11.1. First, write the stems. Then go through the table adding a leaf for each observation. Finally, arrange the leaves in increasing order out from each stem.