CS 725/825 - Information Visualization Spring 2017: Wednesdays, 9:30am-12:15pm, E&CS 2120

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Tableau's data visualization software is provided through the Tableau for Teaching program.

# In-Class Work 1 (ICW1)

See http://www.cs.odu.edu/~mweigle/CS725-S17/Guidelines for general information on ICW assignments.

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## ICW1 - Part 1

Below are two charts (click for larger versions) showing the number of participants in each Summer Olympics since 1900. These charts show the same data, but in different ways.

For each chart, answer the following questions:

1. What year had the most participants?
2. What year had the least participants?
3. Between what consecutive Olympics was there a decrease in the number of participants? (List all pairs.)
4. Between what consecutive Olympics was there the largest increase in participants?
5. Olympics are typically held every 4 years. Is there missing data?
6. What other questions can you answer with this chart?

As you answer the questions, note what you actually did to find the answer. Where did you look? What did you compare?

Now that you've looked at both charts, compare and contrast the charts. For which questions was the bar chart easier to read? For which questions was the line chart easier to read? Why?

## ICW1 - Part 2

Below are three charts (click for larger versions) showing the percentage of Summer Olympics since 1900 that each country has hosted.

For each chart, answer the following questions:

1. What country has hosted the most times?
2. What country (or countries) have hosted the least times (only counting the countries listed)?
3. What percentage of Olympics did the US host?
4. What percentage of Olympics did Canada host?
5. What other questions can you answer with this chart?

As you answer the questions, note what you actually did to find the answer. Where did you look? What did you compare?

Now that you've looked at all three charts, compare and contrast the charts. For which questions was the pie chart easier to read? For which questions was the bar chart easier to read? For which questions did the labeled pie chart help? Why?