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

(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

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.

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(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.

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.

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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.

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(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

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

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