1. Unit 2: Organizing Data Mr. Evans Statistics Part 1

3. Focus Points Determine types of graphs appropriate for specific data Construct bar graphs, pie charts, line graphs, and histograms

4. Bar Graphs A Bar Graph is a graph drawn using rectangular bars to show how large each value is. Also known as Pareto graph, in order from greatest to least

5. Features 1. Display qualitative variable 2. Bars can be vertical or horizontal 3. Bars are of uniform width and uniformly spaced. 4. The length of the bars represent values of the variable being displayed. The frequency of occurrence, or the percentage of occurrence. The same measurement scale is used for the length of each bar, 5. The graph is well annotated with title, label for each bar, and vertical scale or actual value for the length of each bar.

6. Pie Charts A Pie Chart is a circular chart divided into sectors, each sector shows the relative size of each value. Also known as a Circle Chart

7. Features 1. Displays qualitative variables 2. The total quantity, or 100%, is represented by the entire circle. Each wedge of the circle represents a component part of the total. a) Piece of the pie 3. The proportional segments are usually labeled with corresponding percentages of the total

8. Guided Exercise 1 A shopping center tracks for the duration between the time of 8:00-9:00. Dillard’s sold $147, Kohl’s $279, Marshall $220, Macy’s Department $197, Nordstrom $357, and Sears sold $320. Construct a bar and pie chart for the sales of the shopping center.

9. Guided Exercise 1 StoreSales Dillard’s$147 Kohl’s$279 Marshall$220 Macy’s$197 Nordstrom$357 Sears$320 Stores Sales $

10. Histogram A Histogram is a graphical display where the data is grouped into, and then plotted as bars.

11. Features 1. Displays quantitative variables 2. The bars have the same width and always touch 3. The height of each bar indicates frequency

12. Line Graphs A Line Graph that uses points connected by lines to show how something changed in value (as time goes by, or as something else happens).

13. Features Displays quantitative variables All values are connected by a line

14. Guided Exercise 2 1. One-Way Commuting Distances in Miles for 60 workers in Downtown Austin. Sketch a histogram. Class LimitsClass BoundariesFrequency 1-80.5-8.514 9-168.5-16.521 17-2416.5-24.511 25-3224.5-32.56 33-4032.5-40.54 41-4840.5-48.54 48.5 Distances (in miles) Frequency

15. Guided Exercise 2 1. One-Way Commuting Distances in Miles for 60 workers in Downtown Austin. Sketch a histogram. Class LimitsClass BoundariesFrequency 1-80.5-8.514 9-168.5-16.521 17-2416.5-24.511 25-3224.5-32.56 33-4032.5-40.54 41-4840.5-48.54 48.5 Distances (in miles) Frequency

16. Guided Exercise 2 2. The table shows the daily temperatures for New York City, recorded for 6 days, in ℉. Sketch a line graph. DayTemperature 1 43 ℉ 2 53 ℉ 3 50 ℉ 4 57 ℉ 5 59 ℉ 6 67 ℉ Day Temperature ( ℉)

17. Guided Exercise 2 2. The table shows the daily temperatures for New York City, recorded for 6 days, in ℉. Sketch a line graph. DayTemperature 1 43 ℉ 2 53 ℉ 3 50 ℉ 4 57 ℉ 5 59 ℉ 6 67 ℉ Day Temperature ( ℉)