1. Ch 4 Graphs Main topic-How can you appropriately display data

2. 4.1 Categorical variables Key Q-How do you construct and read graphs?

3. Categorical Variables (Categories, classes, topics, intervals) Categories may be numerical or not. Education -Less than HS grad. -HS grad. -Some secondary education. -Secondary degree. -Advanced degree. House Size -2000 to 2500sqft -2501 to 4000sqft -4001 to 6000sqft

4. Frequency Tables 50-591 60-693 70-798 80-8913 90-996 Mr. Booth’s grades (in percent) Rules for quantitative frequency tables 1.Interval should be the same size. 2.No skipping intervals. 3.No overlapping. 4.*Make them nice.*

5. Blue8 Green3 Red7 Yellow10 Black3 Other14 Favorite Color 100-1995 200-2993 300-3990 400-4990 500-59918 600-69917 700-7993 Miles traveled during the summer. (in miles)

6. Pie Chart (Circle Chart) Used to compare a whole on one topic. Needed to construct a pie chart. 1.Percents 2.Degrees

7. Blue8 Green3 Red7 Yellow10 Black3 Other14 Favorite Color

8. Bar Graph Strictly categorical variables.

9. Classes are not connected. Show this by not connecting the bars.

10. Line Charts Best graph for showing change over time.

13. Trend A pattern of increase or decrease. Big picture view point.

15. Seasonal Trend A pattern that occurs every year.

17. Rules for all graphs 1. Must have labels, a title, and a key or legend. 2. Data must standout.