Customers at a fast-food restaurant were invited to complete a brief survey to rate their experiences at the restaurant. One day, 48 customers chose to complete the survey. Which statement best explains why this was probably not a representative sample?

Question

A.
The sample size was too small.

B.
The sample size was too large.

C.
The sample included only those people who chose to complete the survey.

D.
The sample included only those people who were customers at the restaurant.

Answer 1

The best explanation for why the sample was probably not representative is:

C. The sample included only those people who chose to complete the survey.

This is because the customers who chose to complete the survey may have different experiences or opinions than those who did not participate, leading to potential bias in the results.