http://www.ck12.org Chapter 7. Organizing and Displaying Data - Basic
Lesson Summary
In this lesson you learned how to display data that was both qualitative and quantitative. You created bar graphs
that were both single and double. The double bar graphs are very good for comparing two sets of data quickly. The
histogram was another way of representing data. It is similar to a bar graph –without the spaces. You also learned
that both of these graphs lose the actual data when they are plotted. The data itself remains in bins or categories.
Using a stem-and-leaf plot allows the actual data to be saved and it is really an ’at a glance’ graph. Although it
is quicker and less time consuming to manually create a stem-and-leaf than it is a bar graph or a histogram, the
appearance of the latter two graphs is much more appealing to the eye.
Points to Consider:
- Is there any other way to display data that is useful when comparing the values of two data sets?
- Other than sorting the data into categories or bins, there were no mathematical calculations that had to be done
to create these graphs. Are calculations necessary to represent data on another type of graph?
Review Questions
- For the following graph answer the questions below: