An American study published in a recent year claimed to find evidence of voting by nanditizens. The conclusion was based largely on a survey several years prior in which approximately 38,000 registered voters were asked both whether they voted and whether they us and a total of 48 of these people also said they voted. Complete parts (a) through (d) balow a. Based on the survey, what percentage of noneffizons claim to have voted? (Round to the nearest whole number as needed.) b. One difficulty with any survey is response amor, in which, for example, people accidentally check the wrong bac Suppose that the response amor mate for this survey was only 0.1%, meaning that 99.9% of these surveyed answered the survey questions accurately. Ha question Incorrectly? people (Round to the nearest whole number as needed.) c. Assume that the result from part (o) represents citizens who accidentally said they were nonditizens when they were citizens, and that all these people voted. If all other results from this survey were accurate, how would this one set of enors change the number of nor for all the nondition voting found in the survey? nandion(s) vated. If the error mto were %, It would account for all those who claimed to be nonotizen voters. This set of errors would mean that Type Integers or decimala rounded to two decimal places needed)

Readers of the magazine Popular Science (August 1990) were asked to phone in (on a 900 number) their responses to the following question: “Should the United States build more fossil-fuel generating plants or the new so-called safe nuclear generators to meet the energy crisis of the 90s?” Of the total call-ins, 86% chose the nuclear option. What do you think about the way the poll was conducted? What do you think about the way the question was worded? Do you think the results are a good estimate of the prevailing mood of the country?

You are doing a research project in political science to determine the proportion of voters in your district who favor capital punishment. a. If no preliminary sample of voters is taken to estimate p, how large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p? b. The NORC found that approximately 67% of people in the U.S. favor capital punishment. How large a sample is necessary to be 99% sure that the point estimate will be within a distance of .01 from p?

A researcher wishes to estimate the proportion of households with two cars.a) How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 3%?b) Repear part a if a previous study indicates that the proportion of households with two cars is 25%.

A researcher divided subjects into two groups according to gender and then selected a fixed proportion of members from each group for his sample. What sampling method was the researcher using? A. Stratified sample. B. Simple random sample. C. Voluntary response sample. D. Cluster sample.

In a political poll, approximately 3/25 of the people asked preferred candidate A in the upcoming election . If 30,500,000 people were asked , how many of these preferred candidate A ?

1)The population of a city is made up of 2223 men and 7777 women. For an opinion survey, a STRATIFIED SAMPLING of such population was carried out, with 80 people. How many men and women, respectively, should compose the sample? justify

A conservative radio talk show host with a large audience is interested in the proportion p ofadults in his listening area who think the drinking age should be lowered to eighteen. To findthis out, he poses the following question to his listeners: “Do you think that the drinking ageshould be reduced to eighteen in light of the fact that eighteen year‐olds are eligible for militaryservice?” He asks listeners to phone in and vote “Yes” if they agree the drinking age should belowered and “No” if not. Of the 100 people who phoned in, 70 answered “Yes.” a. List one source of sampling bias (i.e. bias based on the people included in the sample). b. List another source of bias (sampling or non-sampling).

A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 541 likely voters indicated that 53% would vote in favor. The reporter goes on to say that the margin of error for this poll was 5%. Complete parts a and b below. a) Explain why the poll is actually inconclusive. Choose the correct answer below. O A. The poll is inconclusive because the standard error of the sample proportion is less than 0.50. O B. The poll is inconclusive because the margin of error is too large. OC. The poll is inconclusive because the sample size is too small. O D. The poll is inconclusive because 50% is included in the confidence interval. b) What confidence level did the pollsters use? The pollsters used a % confidence level.

1 The Blue Tide High School Student Committee has 5 members. They would like to conduct a  survey to get the students’ opinion on the school’s new bell schedule. They asked 23  students’ representatives to distribute a questionnaire to the schools’ 1550 students. In the end, they received 750 responses. They wrote a report based on the information provided by the respondents. 2) which number represents the size of the sample?