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- For this type of data, mathematicians usually use a bar graph.
- Make a bar graph for each set of data. Be sure to use the same scales on each graph. Use Centimeter Graph Paper.
- Plot the Fraction of Deaths on the vertical axis.
- Plot the Age in Years on the horizontal axis.
- Draw the bars between the lines to show that most of the ages fall between the numbers on the horizontal axis.
- Use these questions to describe each graph. Write a true statement about each data set.
- Are all the bars about the same height or are some bars much taller than others?
- Where are the tallest bars: at the beginning, middle, or end of the graph?
- What do the heights of the bars tell you about life spans in this set of data?
- Use the graph to estimate the average life span for the 1858 data.
- Find the median life span for this data.
- Use the graph to estimate the average life span for the 2014 data.
- Find the median life span for this data.
- Compare the two sets. What does the data tell you about the life spans? How did the life spans change?
- What do you think caused the changes in life spans?
