Question 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.

Question 2. Why is quota sampling often used with a convenience sampling method such as mall intercepts?

Question 3. Describe each of the following methods of sample size determination and indicate a critical flaw in the use of each one.

a. Using a "rule of thumb" percentage of the population size.

b. Using a "conventional" sample size such as the typical size pollsters use.

c. Using the amount in the budget allocated for data collection to determine sample size.

Question 4.What are the three fundamental considerations involved with the confidence interval approach to sample size determination?