A poll of 360 randomly selected Rochesterians showed that 234 of them voted in last month's election. Find the 90% confidence interval of the true population proportion Rochesterians who voted.
Q: In Cleveland, a random sample of 73 mail carriers showed that 10 had been bitten by an animal during…
A: Given, n1 = 73 x1 = 10 n2 = 80 x2 = 16 confidence level = 1 - α = 0.95 α = 0.05α2 = 0.025 To find,…
Q: In Cleveland, a random sample of 74 mail carriers showed that 12 had been bitten by an animal during…
A:
Q: In another pre-election poll, a pollster finds that 438 out of 600 people polled favor, Smith.…
A: Given, X = 438 N = 600 The sample proportion is given by:
Q: In a recent poll, 200 people were asked if they liked dogs, and 16% said they did. Find the Margin…
A: Solution: From the given information, 0.16 and n=200. The confidence level is 0.90.
Q: In a recent poll, 410 people were asked if they liked dogs, and 24% said they did. Find the Margin…
A: We have to find margin of error.
Q: A simple random sample of 300 branches out of a total of 1200 branches of a UK travel agency found…
A: Given : Here population is total branches of a UK travel agency Population Size (N) = 1200 Sample…
Q: When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted…
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Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given: Margin of error (E) =0.05. Confidence interval =95%. Z value for 95% confidence interval is…
Q: In a recent poll, 550 people were asked if they liked dogs, and 10% said they did. Find the margin…
A: Givensample size(n)=550p^=10%=0.10confidence level=99%
Q: In a recent poll, 120 people were asked if they liked dogs, and 29% said they did. Find the margin…
A:
Q: In a recent poll, from a sample of 300 likely voters, 175 answered they approve the way the…
A: We have given that, Favorable cases (X) = 175 and sample size (n) = 300 then, We will find the…
Q: In a random sample, 136 of 400 people given a flu vaccine experienced some discomfort. Construct a…
A: Given information n = 400 People No of people given vaccine x = 136
Q: In an exit poll of 625 scientifically and randomly selected voters, 340 expressed support for…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.
Q: In a recent poll, 600 people were asked if they liked dogs, and 58% said they did. Find the margin…
A:
Q: A recent survey showed that among 650 randomly selected subjects who completed 4 years of college,…
A:
Q: A sample of 3048 randomly chosen people found that 341 of them were left-handed. Construct a 99%…
A: Sample proportion=p^=xn=3413048Critical value for 99% confidence interval is=z=2.576n=sample…
Q: Of 91 adults selected randomly from one town, 60 have health insurance. Find a 90% confidence…
A: From the provided information, Sample size (n) = 91 Out of which 60 have health insurance. Sample…
Q: In a recent poll, 300 people were asked if they liked dogs, and 73% said they did. Find the margin…
A:
Q: In another pre-election poll, a pollster finds that 442 out of 650 people polled favor Smith.…
A: Given: Total no of people polled , n=650 No. of people favor Smith, x=442 Confidence level=95%
Q: In a recent poll, 289 people were asked if they liked dogs, and 17% said they did. Find the margin…
A: Let X be the number of people who liked dogs Given: Number of people or sample size (n) = 289…
Q: When 328 college students are randomly selected and surveyed, it is found that 122 own a car. Find…
A: We want to find 95% CI for population proportion (p)
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given Information: Margin of error (e) = 10% Confidence level = 90% The z score at 90% confidence…
Q: In a recent poll, 170 people were asked if they liked dogs, and 24% said they did. Find the margin…
A:
Q: In a random sample of 600 adults, 270 described themselves as vegetarians. Construct a 99%…
A: In a random sample of 600 adults, 270 described themselves as vegetarians.
Q: A political candidate is anxious about the outcome of the next election. To have his next survey…
A: A political candidate is anxious about the outcome of the next election. To have his next survey…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Solution: From the given information, confidence level is 0.90 and E=0.06.
Q: Find a 90% confidence interval for the true proportion of people that eat frog legs, if in a sample…
A: Given, n = 732 p = 0.65 1 - α = 0.90α = 0.1α2 = 0.05 To find, 90% confidence interval for the true…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given:Margin of error (E) = 0.09Confidence level = 90%Since, the proportion of people that support…
Q: In a recent poll, 150 people were asked if they liked olives, and 23% said they did. Find the margin…
A: Given: n=150 p=0.23 α=0.1
Q: Of 130 adults selected randomly from one town, 30 of them smoke. Construct a 90% confidence interval…
A:
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Given that, If the prior information is unknown, assume that the sample proportion is, p^=0.50…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: Find z-critical value:…
Q: In a certain state, a survey of 500 workers showed that 38% belonged to a union. Find the 93%…
A: Computation of critical value: 1-α=0.93α=0.07α2=0.0351-α2=0.965 The critical value of z-distribution…
Q: In a recent poll, 500 people were asked if they liked dogs, and 72% said they did. Find the margin…
A:
Q: In a survey of 952 respondents, 620 of them voted in a recent election. Find a 95% confidence…
A: From the provided information, Number of respondents (n) = 952 Number of respondents who voted in a…
Q: In a recent poll, 100 people were asked if they liked dogs, and 90% said they did. Find the margin…
A: Obtain the margin of error at the 95% confidence level. The margin of error is obtained below as…
Q: In a recent poll, 290 people were asked if they liked dogs, and 61% said they did. Find the Margin…
A: Given: Sample size (n) = 290 Sample proportion p^=0.61 Confidence level = 0.90 So, α=1-0.90=0.10
Q: A survey of 800 women shoppers found that 17% of them shop on impulse. what is 98% confidence…
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Q: In a recent poll, 480 people were asked if they liked dogs, and 44% said they did. Find the margin…
A: Given: Sample size, n =480 p^=44%=0.44 Confidence interval = 90% At 90% C.I:…
Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…
A: As there is no any estimates available, the sample proportion is assumed to be 0.50, that is,…
Q: In a recent poll, 240 people were asked if they liked dogs, and 47% said they did. Find the margin…
A: Obtain the margin of error at the 90% confidence level. The margin of error at the 90% confidence…
Q: f a Random Sample of 450 adults includes 155 who identify as happy, compute an 80% confidence…
A: Given data,n=450x=155sample proportion p=xn=155450=0.34z-value at 80% confidence is Zc=1.282
Q: In a recent poll, 230 people were asked if they liked dogs, and 46% said they did. Find the margin…
A: We have given that, Sample size (N) = 230 and sample proportion (p̂) = 46% = 0.46 and…
Q: In a recent poll, 440 people were asked if they liked dogs, and 21% said they did. Find the Margin…
A:
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- What is meant by the sample space of an experiment?In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing forthe country. Out of 1000 respondents, 600 said it was a good thing. (b) Check the conditions to determine whether you can use the CLT to find a confidence interval. (c) Find the mean and standard error of the sampling distribution? (d) Find a 95% confidence interval for the proportion who believe immigration is a good thing.In a recent poll of 1,003 people conducted by Ipsos Ipsos (see: https://projects.fivethirtyeight.com/biden-approval-rating/ ), 53% of the respondents disapproved of President Biden. Find a 95% confidence interval for the proportion of all people who disapprove of President Biden. Find a 99% confidence interval for the proportion of all people who disapprove of President Biden. What are the respective margins of errors in parts a) and b) and why are they different?
- Michael Scott, regional manager at Dunder Mifflin Scranton, bought a coin from a magic shop that is designed to flip heads much more often than tails. Dwight Schrute, his employee, wants to estimate the proportion of all flips of this coin that will be heads. In 400 flips of the coin Dwight flipped heads 312 times. Construct and interpret the 90% confidence interval for the population proportion of flips that will be heads.A Gallup poll asked a sample of Canadian adults if they thought the law should allow doctors to end the life of a patient who is in great pain and near death if the patient makes a request in writing. The poll included 250 people in Quebec, 198 of whom agreed that doctor-assisted suicide should be allowed.(a) What is the margin of error of the large-sample 99.9% confidence interval for the proportion of all Quebec adults who would allow doctor-assisted suicide? MoE:(b) How large a sample is needed to get a±3 percentage point margin of error (this is very commonly used)? Use the previous sample as a pilot study to get p*. (You may need four decimal places in your critical value to solve this problem.)Sample size:Suppose that a safety group surveyed 800 drivers. Among those surveyed, 83% said that careless or aggressive driving was the biggest threat on the road, and 34% said that cell phone usage by other drivers was the driving behavior that annoyed them the most. Based on these data and assuming that the sample was a simple random sample, construct and interpret a 95% confidence interval estimate for the true proportion in the population of all drivers who are annoyed by cell phone users. The confidence interval estimate is ??––––––?? (Round to three decimal places as needed. Use ascending order.) Interpret the confidence interval estimate. A. There is a 0.95 probability that the population proportion of drivers who are annoyed by cell phone users is in the interval. B. There is 95% confidence that the population proportion of drivers who are annoyed by cell phone users is in the interval. C. There is a 0.95 probability that the sample proportion of drivers…
- Do People Think the Sun Goes around the Earth? In the 2018 General Social Survey, people were askedwhether they thought the sun went around the planet Earth or vice versa. Of 1974 people, 203 thoughtthe sun went around Earth. please do all of them especially e(c) Find the mean and standard error of the sampling distribution?(d) Find a 95% confidence interval for the proportion of all people with this belief.(e) Suppose a scientist said that 30% of people in the general population believe the sun goes aroundEarth. Using the confidence interval, would you say that was plausible? Explain your answer. (b) Check the conditions to determine whether you can use the CLT to find a confidence interval.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 an economist wishes to estimate the mean commute time of workers in Westchester County. The economist obtains a random sample of 31 commutes in Westchester County and finds the sample mean to be 31.2 minutes and the sample standard deviation to be 12.1 minutes. a. Construct and interpret a 90% confidence interval for the mean commute time in Westchester County. b. Construct and interpret a 95% confidence interval for the mean commute time in Westchester County.
- If n=590 and ˆp (p-hat) =0.81, find the margin of error at a 95% confidence levelGive your answer to three decimalsA market analyst is curious what proportion of Carolina residents have a landline. A survey of 94 randomly selected Carolina residents shows that 46 of those selected have a landline phone. The analyst wants to use this data to construct a sample z interval for a proportion. Based on this sample, which of the following is a 90% percent confidence interval for the proportion of residents who have a landline? Select one: a. The interval is (0.4233, 0.5555). b. The interval is (0.3565, 0.6222). c. The interval is (0.4045, 0.5742). d. The interval is (0.2831, 0.6956). e. The interval is (0.3883, 0.5904).If n = 526 and (p - hat )= 0.30, find the margin of error at a 98% confidence level