Chapter 2 - Section 2.2 - Assess Your Understanding - Applying the Concepts - Page 97: 37

See the picture. The plot shows a symmetric bell shaped distribution.

Stems: 4, 5 and 6. There are only three stems. If these stems represent one class each, we will have only three classes for 44 numbers. We need to split the stems. After this step, we have six classes: 4, 4, 5, 5, 6, 6. The first 4 represents the numbers from 40 to 44 and the second from 45 to 49, and so on. The plot shows a symmetric bell shaped distribution.