When preparing a representative sample from a list of 200 customers who complained about errors in their statements, a ____ could ensure the sample is balanced geographically by selecting five customers from each of four zip codes.

When preparing a representative sample from a list of 200 customers who complained about errors in their statements, a ____ could ensure the sample is balanced geographically by selecting five customers from each of four zip codes.




a. systematic sample
b. stratified sample
c. random sample
d. comprehensive sample


Answer: B


Learn More :