This page is designed to be used with the Expanded Animals Starter File.

Part A

1 How many tarantulas are male?

Hint: Sort the table by species!

2 How many tarantulas are female?

3 Would you imagine that the distribution of male and female animals will be similar for every species at the shelter? Why or why not?

Part B

Sometimes we want to compare sub-groups across groups. In this example, we want to compare the distribution of sexes across each species. Fortunately, CODAP allows us to build a variety of displays where we specify both a group and a subgroup.

To create a stacked bar chart…​

To make a multi bar chart…​

  • create a graph of randomly distributed points

  • drag the group to an axis

  • drag the sub-group to the center of the display

  • from the Configuration menu, select "Fuse Dots into Bars"

  • from the Configuration menu, select "Percent" as the scale.

  • create a graph of randomly distributed points

  • drag the sub-group to an axis

  • drag the group to the + in the upper left-hand corner of the graph

  • from the Configuration menu, select "Fuse Dots into Bars"

  • to the right of the graph, locate and click the "Rescale Display" button (it looks like four arrows pointing in different directions) until you can see all of the data.

4 Make a stacked bar chart showing the distribution of sexes across species in our shelter.

5 Make a multi bar chart showing the distribution of sexes across species in our shelter.

6 What do you notice?

7 What do you wonder?

8 Which display would be most efficient for answering the question: "What percentage of cats are female?" Why?

9 Which display would be most efficient for answering the question: "Are there more cats or dogs?" Why?

10 Write a question of your own that involves comparing subgroups across groups.

Which display would be most efficient for answering your question? Make the display.

11 Write a different question that would be more efficient to answer with the other kind of display.

These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). CCbadge Bootstrap by the Bootstrap Community is licensed under a Creative Commons 4.0 Unported License. This license does not grant permission to run training or professional development. Offering training or professional development with materials substantially derived from Bootstrap must be approved in writing by a Bootstrap Director. Permissions beyond the scope of this license, such as to run training, may be available by contacting contact@BootstrapWorld.org.