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Unformatted text preview: A. Public Opinion What is public opinion? the sum of individual attitudes or beliefs about an issue or question . What is the difference between the Delegate Model of Representative Democracy vs. the Trustee system of democracy?- Delegate Model of representative democracy- elected officials are obligated to seek out and follow the views of their constituency when they make political decisions (i.e., encourage polls) Assumes an informed public and accurate polls- T rustee system of democracy- elected officials are the experts so they should make decisions which they feel are correct whether or not they are supported by public opinion b. Assumes uninformed public What is survey research? the idea is to sample a subset of the population that you are interested in. : in most cases it is impossible to get responses from the entire population and according to "science" this is all we need. Census and politics: what is the debate between the Republicans and Democrats?- census taken every ten years; used to decide apportionment (how many seats a state will have in congress), federal money, etc.- Republicans favor an actual count and Democrats favor sampling What is the t rue sample and what the problem with it? Must accurately represent the real population and be uniformly random. you can make generalization from this sample to the general population , this is almost never generated. What is a Representative sample? Every attribute of the sub population should be like the real population. To get a representative sample we need to generate a random sample What is a random sample and the problems of generating one? each and every person in the entire population has an equal opportunity to be selected for the analysis. Problems with generating a random sample 1. Is there any such thing as pure randomness 2. Certain groups do not respond to surveys 3. Increase in phone solicitation, junk mail, email, cause a low response rate to surveys 4. Method used to generate a random sample often flawed What is the Literary digest example that occurred in 1936? Landon vs. Roosevelt Used telephone and automobile registration lists which was not representative of the population What are the following: The population size (homogeneity) homogeneity, the degree to which members of a population are alike in terms of the characteristics we are interested in studying The more heterogeneous the population the more people we have to sample The larger the population the larger the sample has to be? False Once the population gets to a certain size then the sample size are the same (100,000) Margin of error (How to calculate) Margin of error is the difference between the T rue sample and the sample we generated Level of confidence How confident am I that the margin or error I chose is correct What is Instrumentation? The process of designing survey questions....
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- Spring '07