Reference no: EM132851832

a) Suppose that simple random samples of adult Americans are asked to complete a survey describing their attitudes toward the death penalty. Suppose that one group is asked," Do you believe that the U.S. judicial system should have the right to call for executions?" while another group is asked, " Do you believe that the death penalty should be an option in cases of horrific murder?" Would you anticipate that the proportions of "yes" responses might differ between these two groups? Explain.

b)Suppose that simple random samples of students on your campus are questioned about a proposed policy to ban smoking in all campus buildings. If one group is interviewed by a person wearing a T-shirt and jeans and smoking a cigarette while another group is interviewed by a non-smoker wearing a business suit, would you expect that the proportions declaring agreement with the policy might differ between these two groups? Explain.

d) Suppose that simple random samples of adult Americans are asked whether or not they approve of the President's handling of foreign policy. If one group is questioned prior to a nationally televised speech by the President on his/her foreign policy and another is questioned immediately after the speech, would you be surprised if the proportions of people expressing approval differed between these two groups/ Explain.

e) List four sources of bias that can affect sample survey results even if the sampling procedure used is indeed a random one. Base your list on the preceding four questions.