Statistics

Statistics are a collection of quantitative data. They are produced by analyzing large quantities of numerical data. Statistics are often used to estimate what proportion a sample of data represents in the whole set of data. There are pros and cons for using statistics. Statistics and data can help us better understand the world. They help us to make predictions and evaluate the quality of products or processes. You can use statistics to increase your credibility or create an emotional impact on participants. But be careful in your choice of statistics. It is important to use trusted sources for data and statistics. Government statistics are generally high quality because they are based on very large samples. However, the information sometimes is collected for a political purpose. Data collection or calculation may be manipulated to fit that bias.

Make sure that the statistics you choose supports the message or argument. When choosing a statistic, think about what data the participants will find interesting. Showing how the statistic has changed over time can increase the power of the message. Be sure to connect the statistic to the participants’ lives or jobs. Sometimes you will need to help participants understand statistical terminology, like mean, median, standard deviation, and statistical significance, so they can interpret statistical data. You can help put statistics into context for the participants by creating graphs or other visual aids.

Instructions

To present statistics for maximum impact:

  1. Identify the appropriate statistic.
  2. Create a slide to display the statistic. Highlight it in a chart or graph or use a photograph to make an emotional connection.
  3. When instructing, speak slower than your normal rate to signal the importance of the statistic.
  4. Pause immediately before the statistic, to create suspense.
  5. Use body language, like spreading your arms, to demonstrate the magnitude of the statistic.
  6. Pause immediately after the statistic, to allow participants to process the meaning.
  7. Use facial expressions to convey the appropriate reaction.

For more information on using statistics to provide background information, refer to Background Information.

For More Information

For more information about transportation statistics, refer to the United States Department of Transportation, Bureau of Transportation Statistics website opens in new window.