Describe each of the following methods of sample size determination and indicate a critical flaw in the

Question:

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