You wish to estimate the proportion of voters who plan to vote in favor of a certain ballot measure. Obtain a sample size that will ensure a margin of error of at most 2.5% for a 95 % confidence interval. Assume it reasonable to assume that of the voters sampled, approximately 70% will be in favor of the measure. (You do not need to find the confidence interval.)

Through polling, it was estimated that the percent of people who will vote for a particular candidate in an upcoming election is 36.2%. If the margin of error is 3.5, give the confidence interval for the percentage of people who will vote for the candidate in the upcoming election.% to %

An economist needs to estimate the proportion of residents of Sebastian that have earned a college degree. Determine the most conservative estimate of the sample size required to limit the margin of error to within 0.025 of the population proportion for a 96% confidence interval.Round the solution up to the nearest whole number.n=

In a survey of 2477 adults in a recent​ year, 1491 say they have made a New​ Year's resolution. Construct​ 90% and​ 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. The​ 90% confidence interval for the population proportion p is   A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 3​% of the true proportion. ​(a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum sample size​ needed, using a prior study that found that 38​% of the respondents said they think Congress is doing a good or excellent job. ​(c) Compare the results from parts​ (a) and​ (b). ​(a) What is the minimum sample size needed assuming that no prior information is​ available? n=

A political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each person was asked who they plan on voting for in the 2024 presidential election. 110 said they plan on voting for Candidate A, 185 said they plan on voting for Candidate B, and 15 were unsure or plan to vote for another candidate. The researcher wants to construct a 95% confidence interval for the proportion of all registered voters in Orlando who plan to vote for Candidate B. What is the point estimate? Round final answer to 3 decimal places.

Suppose that 67% of voters in a state oppose concealed carry handguns. Repeated random samples of 400 voters were collected. Use the Empirical Rule to find the interval in which the sample proportion of opponents should fall 95% of the time. Select one: A. (64.6%,69.4%)(64.6%,69.4%) B. (63.8%,70.2%)(63.8%,70.2%) C. (60.7%,73.3%)(60.7%,73.3%) D. (61.5%,72.5%)(61.5%,72.5%) E. None of the above

A clothing designer creates a unisex outfit and wants to be 95% certain that it’ll fit both men and women; it was designed to fit an individual of 65 inches height. An assistant gathers the heights of random men and women walking down the street (see the attached data). Using the data, determine if the outfit will fit both men and women with 95% confidence. Need a hypothesis test included. Data Table: Women Men 63.0 71.4 65.7 69.9 65.2 73.2 65.9 69.7 60.8 70.4 62.9 66.3 69.6 78.7 67.5 69.8 63.4 73.5 63.8 68.1 63.0 68.1 63.7 76.0 66.1 68.0 61.9 69.8 63.5 71.1 68.1 68.1 60.8 76.4 65.4 66.4 65.3 72.9 64.0 67.3 64.9 64.8 61.1 70.7

The Department of Health and Human Services has been asked to estimate the proportion of "latch-key" children (children who have their own key and come home to an empty house) in New Jersey. This estimate is to be within plus or minus 0.03 of the true population proportion with a 98% level of confidence. The head of the Department's Family Division has no idea of what this proportion might be, so she uses 0.5 as the “estimate" of p. What size sample of New Jersey's children should be taken? 5.

In a recent poll, 440 people were asked if they liked dogs, and 21% said they did. Find the Margin of Error for this poll, at the 95% confidence level. Give your answer to four decimal places if possible.

A congressperson wants to estimate the proportion of people in her district that think she is doing a good job. At least how many people should she poll in order to achieve at most a margin of .03 = 3% at confidence level .95?