Political Opinion Polls

1970 general election advertising answer areas asked Britain Britain's entry British General Election by-election candidate Central Office Common Market concerned conducted Conservative Central Office Conservative party Conservative research department considerable constituency D. E. Butler Douglas-Home effect election campaign election results electors enquiry factor favour Gallup Heath immigrants important influence interest interviewed June Labour lead Labour party Liberal London major marginal Mark Abrams market research Marplan measure methods nationalisation newspaper non-respondents NOP found Opinion Research Orpington by-election particularly party leaders party organisation party's politicians poll No poll polling organisations pollster popularity population Prime Minister private polls problem public opinion polls question quota sampling random sample reinterviewed relatively relevant research department respondent sampling error showed simple random sample social studies survey research swing Table techniques tion trade unions turnout voters voting behaviour voting intentions Wilson