HCS 2260 Problem Set 1 Note that there are questions on the back of the sheet Due Monday, June 9 Show your work partial credit awarded for incorrect answers. 1) A poll was conducted to determine the topics that voters are most concerned with. The findings show that 40% are concerned with the influence of wealthy people and corporations, 35% are concerned about negative attacks and 20% are concerned that nothing will change regardless of who wins. The survey was based on 1005 registered voters selected at random from all US voters. Describe the sample. Describe the population from which the sample was selected. Is the sample representative of the population? What is the variable of interest? How is the inference expressed? Newspaper accounts of most polls usually give a margin of error (i.e. plus or minus 3%) for the survey result. What is the purpose of the margin of error and what is its Interpretation? ce Rose -~ 2) A web site has a survey question entitled, \"Who do you think will win the Oscar?\". Readers can choose | of 5 candidates. The web site later reports on which candidate had the most votes. Explain how this procedure differs from a scientifically conducted survey. 3) A data set contains the observations -2, -1, 0,4, 7. Find: a x i eee \"e Exr-Os