- To experiment with collecting data.
- To understand why collecting different types of data is useful for answering certain questions.
- To practice with choosing their own graph type and analyzing spread data.
- How many times can you bounce a ball in 30 seconds? Design an experiment to answer this question.
- What kind of data will you need to collect to answer this question? Why?
- What factors could affect the amount of times you are able to bounce the ball? Brainstorm at least 3. Remember to account for these when designing your experiment.
- Tennis Ball or Rubber Ball
- Gather the materials you need (a bouncy ball, a stopwatch, etc.). You can do this on your own or in a small group.
- Bounce the ball for the length of time your experiment requires. The amount of bounces should be recorded for each trial.
Post- Experiment Questions
- What graph do you think will best represent your data (dot plot, bar graph, bar graph, or histogram)? Why? Graph your data using your choice.
- What are the mean, median, mode and range for your data?
- Based on your calculations and your graph what would be the best measure of center for the amount of time you bounced the ball? Why?
- If you wanted to bounce the ball 1,000 times how long would it take you? If you worked in a group only look at your personal bounce data here.
Compare with friends! Have a friend (or another small group) complete the investigation as well, and hang up the the final graphs next to one another. Compare and contrast the graphs.
- Which person (or group) had the highest average number of bounces? How do you know?
- What can you say about the range of each of the graphs? How do you know?
- What center of spread would be appropriate for each graph? Does it vary from person to person? Why?
- How do the different types of graphs used display the data in different ways? Does it affect the way you read the data?