1. Human error can occur during the sampling process. When working with an outdated customer database to create a representative sample, what potential error can occur?

A. selection error

B. population specification error

C. frame error

D. non-response error

2. When checking out at a pharmacy or a grocery store, you sometimes are invited to fill out an online questionnaire about your in-store experience. When analyzing these results, what type of error should the MRP be accounting for?

A. processing error

B. frame error

C. selection error

D. population specification error

3. The following are all non-probability sampling techniques, except ______.

A. stratified random sampling

B. snowball sampling

C. quota sampling

4. Identify the sampling technique being described: Divide the population to be studied into groups based on a common trait, then randomly select several groups, and interview every person within each group.

A. cluster sampling

B. random sampling

C. snowball sampling

Hint: To answer this question, think of the steps involved in each non-probability sampling technique.