Day 131Histograms and Intervals

Build the idea

Group numerical values into adjacent, nonoverlapping intervals. Count each observation in exactly one interval, draw touching bars, and label the numerical axis and the frequency axis.

Your turn

Work in order. Start with the foundations, then build toward explanation and application.

1. Daily reading times in minutes: 11, 7, 14, 11, 7, 8. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

2. Daily reading times in minutes: 14, 13, 7, 11, 9, 3. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

3. Daily reading times in minutes: 10, 9, 2, 15, 15, 6. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

4. Daily reading times in minutes: 13, 4, 3, 10, 1, 15, 15, 16, 18, 5. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

5. Daily reading times in minutes: 10, 10, 10, 0, 4, 19, 0, 0, 4, 17. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

6. Daily reading times in minutes: 3, 6, 7, 3, 18, 2, 2, 13, 12, 3. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes.

7. Daily reading times in minutes: 16, 12, 7, 19, 5, 14, 2, 18, 11, 16. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes. Which interval has the greatest frequency? Include ties.

8. Daily reading times in minutes: 8, 7, 8, 17, 7, 6, 17, 8, 7, 2. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes. Which interval has the greatest frequency? Include ties.

9. Daily reading times in minutes: 10, 11, 12, 4, 5, 14, 12, 16, 0, 14. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes. Which interval has the greatest frequency? Include ties.

10. Daily reading times in minutes: 17, 15, 18, 8, 8, 9, 14, 1, 4, 11. Draw a histogram using bins 0–4, 5–9, 10–14, and 15–19. Label axes. Which interval has the greatest frequency? Include ties.