1. 2.2 Bar Charts, Pie Charts, and Stem and Leaf Diagram
Chapter 2
(Page 78)

2. (Page 78)
Bar Chart – a graphical representation of a categorical data set in which a bar is drawn over each category.
(Page 79)
Take up: Table 2.8
Figure 2.10
Figure 2.11

3. Constructing Bar Charts
(Page 78)
Bar Chart – a graphical representation of a categorical data set in which a bar is drawn over each category.
(Page 80)
Constructing Bar Charts
Define the categories for the variable of interest.
For each category, determine the appropriate measure of value.
For a column bar chart, locate the categories on the horizontal axis.
For a horizontal bar chart, locate the categories on the vertical axis.

4. (Page 79)

5. (Page 80)

6. (Page 80)

7. (Page 81)

8. (Page 84)
Pie Chart – a graph in the shape of a circle which is divided into slices proportional to the magnitude of the displayed variable associated with each category.

9. Constructing Pie Charts
(Page 84)
Constructing Pie Charts
Define the categories for the variable of interest.
For each category, determine the appropriate measure or value.
Construct the pie chart by displaying one slice for each category.

10. (Page 84)

12. Constructing the Stem and Leaf Diagram
(Page 86)
Stem and Leaf Diagram – a graphical representation that shows the individual data values.
Constructing the Stem and Leaf Diagram
Sort the data from low to high.
Analyze the data for the variable of interest.
List all possible stems in a single column.
For each stem, list all leaves associated with the stem.

13. (Page 86)

16. (Page 87) Exercises: 2 – 24, 2 – 25 2-24 Education Level Percentage
Size
Less than high school graduate 18
64.8
High School Graduate 34
122.4
Some college 14
50.4
College graduate 30
108
Graduate degree 4
14.4
Total
100
360

17. 2-25
Stem
Leaf .7 .8 1 .0 .1 .4 2 3 .3 4 5 6

18. Home Exercise
Answer Page 89
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