Recipe preferences by consumers

Talk about survey data — measurements from a sample of individuals where we observe but do not intervene. Mention the use of sample proportions as summary statistics.

The diagram shows sample-to-sample variability in a sample proportion. Ask the question:

How much should you trust a statistic that would be different if you had used different people?

then say that a major role of statistics is to understand and describe the randomness of such summaries statistics.