Math 143 C/E, Spring 2001
IPS Reading Discussion Questions
Chapter 3, Section 3

1. How are the concepts of population and sample related?

   
   
   
   
   
   
   
   

2. The voluntary response sample discussed in Example 3.15 (p. 256) is not an SRS (Simple Random Sample). What, in your own words, is an SRS, and how does this sample miss out on being one?

   
   
   
   
   
   
   
   
   
   
   

3. Neither stratified random sampling nor multistage sampling are truly examples of SRS, but, carried out correctly, they are considered (for many purposes) to be random enough to produce a representative sample.

   1. What are the similarities you notice between stratified sampling (a term associated with survey samples) and blocking (a term associated with the design of experiments)?

      
      
      
      
      
      
      
      
      
      
      

   2. Describe a typical multistage sampling design for a survey. Is it possible to implement both multistage and stratified sampling in the same design?

      
      
      
      
      
      
      
      
      
      
      

4. List and describe (briefly) the types of sampling errors mentioned in the section that can result in a biased survey process.