Final answer:
Option (D), Discovery sampling stops once the first error is found. Cluster sampling is used in the department store employee survey, systematic sampling is used for the health club survey, and stratified sampling for the community college survey.
Step-by-step explanation:
The sampling plan that requires no additional sampling once the first error is found is Discovery sampling. This approach is particularly used in auditing where the presence of just one error can be significant enough to warrant concern. It is designed to test for the occurrence of critical errors, and as soon as one is detected, the sampling process is stopped.
Now, to address the survey design questions:
- The department store scenario where interviews are conducted with all employees in a few randomly selected departments is an example of Cluster sampling.
- Asking every tenth customer to complete a survey represents a Systematic sampling method.
- When an instructor selects a few students from each class randomly, it is an example of Stratified sampling.