A random sample survey of 865 voters in a local town reveals that 408 favor approval of an increase in the sales tax. What is the point estimate for the population proportion of approval? Construct the 95% confidence interval for the true proportion of all voters in the state who favor approval. Provide an interpretation of the confidence interval in 1 – 2 complete sentences.

Q: Suppose a polling agency reported that 47.3% of registered voters were in favor of raising income…

A: We have given that  best point estimate of proportion p^ = 47.3% = 0.473 Sample size n = 1001 Margin…

Q: A wildlife refuge takes a survey of its past donors to try to estimate the percentage of all past…

A: We have given that,  Favorable cases (X) = 42 and sample size (n) = 150 Then,  We will find the 99%…

Q: A researcher in campaign finance law wants to estimate the proportion of elementary, middle, and…

A: We have to find sample size required.

Q: survey of 1000 students concluded that 274 students chose a professional baseball team, A, as his or…

A:

Q: A local news outlet reported that 56% of 600 randomly sampled Kansas residents planned to set off…

A: We have given that,  Sample proportion (p̂) = 56% = 0.56 and sample size (n) = 600 Then,  We will…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: 1. A member of the House of Representatives wants to determine the proportion of voters in her…

A: Obtain the 99% confidence interval to estimate the proportion of voters who favor a flat income tax.…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given data, n=152 x=101 p=x/n =0.664 The 95% CI is Zc=1.96

Q: In a public opinion survey, 60 out of a sample of 70 high-income voters and 90 out of a sample of…

A:

Q: The business college computing center wants to determine the proportion of business students who…

A: Solution: Note: Hello! As you have posted 2 different questions, we are answering the first…

Q: 5. For a class project, a political science student at a large university wants to estimate the…

A: Given: n=500 x=300 then , P=xn=300500=35P=0.6

Q: A Harris Poll survey of smokers in which 805 of a sample of 993 smokers agreed that smoking would…

A: Given: x=805n=993α=0.01

Q: A bank randomly selected 200 checking-account customers and found that 110 of them also had savings…

A: Given that A bank randomly selected 200 checking-account customers and found that 110 of them also…

Q: Based on a random sample of 400 voters in which 285 said they favored the idea of a new city…

A: Given: n = 400 x = 285 Confidence level = 97%

Q: uman resources managers, 71% of respondents felt they should hire new staff within the next three…

A: The Upper limit can be calculated as: Upper limit = Point estimate (sample proportion) + Margin of…

Q: In a random sample of 90 homeowners, 71% of them have received robocalls over an outstanding debt.…

A: Sample size(n)=90 Sample proportion who have received robocalls  over an outstanding…

Q: Construct a 95% confidence interval for the difference between population proportion of voters in…

A:

Q: A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on…

A: From the given information, The sample size is 75. Out of 75 students, 16 are found to have…

Q: n a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for…

A: The given data is appropriate for single proportion confidence interval . because it is a large…

Q: Based on a sample of 250 people, she obtains the following 99% confidence interval for the…

A: Given : 99% confidence interval for the population proportion, p: 0.113 < p < 0.171.

Q: Construct a 95% confidence interval on the population proportion for the support of candidate A in…

A: Given: Number of residents (n)=300Sample proportion(p^)=51%=0.51

Q: In a Harvard School of Public Health survey, 2105 of 10,904 randomly selected U.S. college students…

A: Given data is appropriate for testing of hypothesis. Because it is a large sample test for single…

Q: A poll reported 37% support for a statewide election with a margin of error of 4.18 percentage…

A:

Q: airline has surveyed a simple random sample of air travelers to find out whether they would be…

A:

Q: in a recent poll, 220 people were asked if they liked dogs, and 36% said they did . find the margin…

A:

Q: search for the Ford Motor Company, you find that a random sample of 800 households includes 721 in…

A: At 98% confidence level, the z value is 2.33 which can be obtained by using the standard normal…

Q: When 328 college students are randomly selected and surveyed, it is found that 122 own a car. Find a…

A: From the provided information, Sample size (n) = 328 122 own a car that is x = 122 Confidence level…

Q: 23. A sample of 250 male registered voters showed that 57% of them are in favour of higher taxes on…

A: The question is based on a confidence int. for difference between two popl. prop. Given : Confidence…

Q: To find the proportion of San Diegans subscribed to Disney+ in 2019, a researcher randomly selected…

A: Given that, n=200 p^=101200=0.505

Q: From a sample of 2412 Jawas, 1013 said they had recently sold a stolen droid to a moisture farmer.…

A: We want to find the 99%CI for population proportion (p) Given  X=1013, n=2412 ɑ=0.01

Q: A survey of 927 voters in one state reveals that 537 fever approval of an issue before the…

A: We have given that,  Favorable cases (X) = 537 and sample size (n) = 927 Then, We will find the 95%…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Here,…

Q: What is the lower bound of a 90% confidence interval for the percent of the population that would…

A: here given ,  In a sample of 235 people, 40% responded they would vote for candidate A.  p^ = 0.40…

Q: An economist at the Florida Department of Labor and Employment needs to estimate the unemployment…

A: Given data, p=2.4%=0.024 n=532

Q: n economist at the Florida Department of Labor and Employment needs to estimate the unemployment…

A: Given data,n=532proportion of residents were unemployed is p=2.4%=0.024

Q: Assume a nationwide random survey of 800 adults asked about attitudes toward “alternative medicine”…

A: We have given that,  Sample size (n) = 800 and Favorable cases (X) =448 Then,  We will find the 99%…

Q: In a study of the relationship between alcohol use and bicycling fatalities, the researcher…

A:

Q: The Vice-Chancellor of a university is concerned that illicit drug use on campus is higher than the…

A: In this case, the confidence level is 90%. The 90% confidence interval for the true proportion of…

Q: A poll found that82​%of a random sample of 1093 adults said that they believe in ghosts. a.…

A: a) Given that n=1093p^=82%=0.82Confidence level=99%=0.99Significance level=0.01 The z critical value…

Q: university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: Estimate, with 95% confidence level, the true proportion of low-income people who will  vote for the…

A: Given : In a public opinion survey, 80 out of a sample of 100 high-income voters and 55 out of a…

Q: a) How large a sample do you need to guarantee that a 95% confidence interval is no wider than 0.1?…

A: z = 1.96 Margin of error = 0.1 p = 0.5 The sample size is given by ​​​​​​​

Q: In a recent poll, 570 people were asked if they liked dogs, and 14% said they did. Find the margin…

A: From the Standard Normal Table, the z value for 95% level is 1.96.

Q: A TV report conducted a survey of 908 people in Phoenix metro area and found that 28% of the…

A: Given Total people n = 908 Probability p = 0.28 we are 94% confident that the true proportion of…

Q: In a past presidential election, 36,523,493 people voted for Candidate A; 36,417,321 for Candidate…

A: The appropriate interpretation is to be made considering the proportion of votes for candidate A.

Q: Construct a 99% confidence interval for the proportion of all motorbike license applications that…

A: We want to find the 99% confidence interval  Given  X=20 , n=175

Q: A random sample of 25 statistics students was asked: “Have you smoked a cigarette in the past week?"…

A: Given that  Random sample size(n) = 25 Students reported smoking within the past week (X) =6…

Q: genetic experiment with peas resulted in one sample of offspring that consisted of 417green peas…

A:

Q: Assume we had no prior knowledge about the true proportion π. We want to construct a 95% confidence…

A: 1. The margin of error 2%, no prior knowledge about the true proportion then π=0.5 Computation of…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given dataError = 2.5% = 0.025Confidence level = 0.995Significance level = α=1-0.995=0.005