The CDC wants to get an idea of how Americans feel about the Vaccine Distribution. In order to get the information, the CDC partnered with the state governments of each state to send a survey to 950 randomly selected state employees from each state.
Survey respondents were asked to decide to what degree they agreed with the following statements. The possible answer were "Strongly Agree", "Agree", "Neither Agree or Disagree",
"Disagree" "Strongly Disagree".
• The incredibly important process of distributing the life-saving COVID-19 vaccine has been fairly implemented by the various state governments
• The decision making process for who gets access to the vaccines has been equitable, with all demographic groups getting equal access
34388 state employees responded to the survey. 81 % of the respondents said that they "Agree" or "Strongly Agree" that the process has been fairly implemented and 77 % said that they "Agree" or "Strongly Agree" all demographic groups are getting equal access.
1. Does the above use a sampling frame? If so, what is the sampling frame?
2. What is the sampling method used in the above scenario?
3. Looking at the sampling frame and the sampling method, would the sample be a valid sample or is it likely to be a bias sample? Explain why.
4. Identify potential sources of bias other then the sampling method from the information given and explain why they lead to bias (Only use the information given, do not speculate about information not provided).
5. If the CDC did the survey again, would you expect that exactly 81 % of respondents would
"Agree" or "Strongly Agree" that the incredibly important process of distributing the life-saving
COVID-19 vaccine has been fairly implemented by the various state governments? Why or why not?
6. Based on the results of this survey, can the CDC be sure that they understand how Americans feel about the vaccine distribution? Why or why not?