Bar Graph Analysis and Creation
A Picture is Worth a Thousand Words

Print this page and use it to complete the lesson.

Bar Graphs -- Analysis of Data:

  1. Go to http://www.census.gov/statab/www/img/smoke.gif

  2. Use the bar graph to answer these questions:

    • What was the average percent of male smokers in 1992?
    • What was the average percent of female smokers in 1992?
    • Are differences between male and female smoking rates consistent in each age bracket?
    • What are some possible reasons for the large decrease in smokers age 65 and over?
    • If a bracket for ages 10 - 17 years had been included, what do you predict the values would be? Why?

Bar Graphs -- Creation:

  1. Go to http://icg.fas.harvard.edu/~census/

  2. This site displays United States census information for the years 1790 - 1970. Select a decade as your topic of investigation.

  3. Select a theme from your decade.

  4. Select several northern states and southern states.

  5. Select up to 10 topics to analyze.

  6. Scroll to the bottom of the page and click the "Browse" button.

  7. Create 2 bar graphs:

    • states vs. topic 1 of your choice
    • states vs. topic 2 of your choice

  8. Discuss the results of your investigation. Write 3 questions that can be answered by studying your graphs.
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