Worksheet 4: Data

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Terminology for data

1. What could explain the variability in waiting time for Old Faithful?

2. Organ donations a. What are the observational units in the organ donation study?

   b. What are the variables in the organ donation study? Are the quantitative or categorical?

3. Suppose you want to study what makes pairs of college dorm mates compatible.

   a. What are the observational units?

   b. What are some relevant variables?

4. Suppose you want to study the availability of vegetarian meals at Stanford dining halls.

   a. What are the observational units?

   b. What are some relevant variables?

Data Visualization

5. What is wrong with the “stylish” piechart?

6. What are some problems with the bar chart showing average height?