`50:00`

STAT 20: Introduction to Probability and Statistics

**So far**: Pose question -> observe data -> analyze data -> make claim.

- e.g. Iranian election:
- Did fraud occur?
- Observe vote counts by city.
- Test of hypothesis that votes follow Benford’s law.
- Votes don’t follow Benford’s law well but not clear that this means fraud.

**This week**:- Identify possible claim
- Imagine analysis that would show it.
- Plan data collection to allow that analysis.
- Carry out data collection + analysis.
- Check claim.

Please get into groups of 3 (or 4). Take turns introducing yourselves.

**Your challenge**: Determine whether you can affect one your teammates’ perceptions of bubble water by manipulating their experience of tasting.

- 50 minutes (half of next class)
- 2 cans of soda water, each one from a different flavor
- small paper cups
- saltine crackers
- other materials welcome

- Be precise in your protocol.
- Be sure your claim corresponds to your protocol corresponds to your data corresponds to your plots.
**Important**: Lab 7.1 must be fully completed and shown to instructor before beginning Lab 7.2. Finish today if possible, by Friday night (due date) at latest.

`50:00`