1. What is random-digit dialing and why is it used?
2. How does a compiled mailing list differ from a response mailing list?
3. Explain what is meant by sampling error, response error, and nonresponse error in survey research.
4. A research firm finds that only 33% of those who reported buying Kellogg's Frosted Flakes had actually purchased the product during the period monitored. What type of survey research error does this represent?