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Chapter 2.3

Chapter 2.3. Time series graphs and Pie Graphs. Time Series Graph. A time series graph represents data that occur over a specific period of time. Very similar to line graph. Steps for making a Time-Series Graph. Draw and label the x and y axes

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Chapter 2.3

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  1. Chapter 2.3 Time series graphs and Pie Graphs

  2. Time Series Graph • A time series graph represents data that occur over a specific period of time. • Very similar to line graph

  3. Steps for making a Time-Series Graph • Draw and label the x and y axes • Label the x axis for years and the y axis for numbers • Plot each point according to the table • Draw line segments connecting adjacent points. Do not try to fit a smooth curve through the data points

  4. Create a Time Series graph • The number of homicides that occurred in the workplace for the years 2003-2008 are shown. Draw and analyze a time series graph for the data.

  5. Time-Series graph of Workplace Homicides

  6. Compound time series graph • Two or more data sets can be compared on the same graph called a compound time series graph

  7. Create a compound time series graph • Construct a compound times series graph for the data in the table • The data represents the number of successful space launches by the United States and Japan for the years 1993-1997

  8. Time series graph of space launches

  9. Pie Graph • A pie graph is a circle that is divided into sections or wedges according to the percentage of frequencies in each category of the distribution. • The purpose of the pie graph is to show the relationship of the parts to the whole by visually comparing the sizes of the sections.

  10. Steps for creating a pie graph • Since there are 360° in a circle, the frequency for each class must be converted into a proportional part of the circle. • Convert each frequency to a percentage (not the same as the degrees) • Draw your circle graph as accurately as possible (protractors when possible)

  11. Super Bowl Snacks The frequency distribution shows the number of pounds of each snack food eaten during the super Bowl..

  12. Pie Graph – Super Bowl Snacks

  13. Create a Pie Graph for the Data The table show the blood types of 25 army inductees

  14. Pie Graph – Blood Types

  15. With a little help from our friends… • Making time series graphs and pie graphs using TI-84 and Excel! • Pg. 91-94

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