1. Distinguish a nonprobability from a probability sampling method. Which one is the preferable method and why? Indicate the pros and cons associated with probability and nonprobability sampling methods.
2. List and describe briefly each of the probability sampling methods described in the chapter.
3. What is meant by the term random? Explain how each of the following embodies randomness: (a) blind draw, (b) use of random digit dialing, and (c) use of a computer to generate random numbers.