A political party wants to know the reaction of voters to a debate between congressional candidates. Identify the sampling method used in each example below.
1) cluster sampling 2) simple random sampling 3) stratified sampling 4) convenience sampling 5) systematic sampling
-The party's polling staff calls phone numbers randomly
selected by a computer.
-The party's polling staff calls phone numbers in the order they
appear on their list until they have enough responses.
-The party's polling staff randomly selects six area codes in the
congressional district and calls each number with that area code.
-The party's polling staff calls every 80th phone number in their
list.
-The party's polling staff calls 65 phone numbers from each area
code in the congressional district.