A survey of 225 randomly chosen commuters are asked if they support an expanded public transportation system. 99 said yes. Construct a 95% confidence interval for the proportion of all commuters who support expanded public transportation. Explain how your confidence interval supports the decision you made in the hypothesis test in the previous question.

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

A: In this question, It has been given that Margin of error = 0.05 and level of significance = 0.005.…

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: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: In a survey of 1,200 social media users, 56% said it is not okay to be friends with your boss.…

A:

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, 430 people were asked if they liked dogs, and 41% said they did. Find the margin…

A: It is given that the value of n is 430, p hat is 0.41 and the confidence level is 0.99.

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

A: The point estimate=p^=118200=0.59n=sample size= 200z=critical value of 95% confidence…

Q: the 1824 voters sampled in the exit poll discussed , 60.5% said they voted for Jerry Brown. Is there…

A: We have given that  Sample size n=1824 , Sample proportion p^=60.5%=0.605

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

A: The formula for the sample size is as follows: Here, zα/2 is the critical value at 99% confidence…

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

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

Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: In a recent poll, 560 people were asked if they liked dogs, and 22% said they did. Find the margin…

A: For 95% confidence intervalα=1-CI=1-0.95=0.05So, zα2=z0.052=z0.025=1.96

Q: When a recent survey asked subjects whether it should or should not be the​ government's…

A: The total number of subjects that is sample size (n) = 1496The number of subjects who said yes that…

Q: In a recent poll, 150 people were asked if they liked dogs, and 55% said they did. Find the margin…

A:

Q: In a recent polI, 200 people were asked if they liked dogs, and 15% said they did. Find the margin…

A: From the provided information, Sample size (n) = 200 15% people said they like dogs that is p̂ =…

Q: Explain which would result in a wider large-sample confidence interval for p: a sample size n=100 or…

A: The sample sizes are 100 and 400.

Q: In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education. Find…

A: Ans- Given the level of confidence interval   90 %                                        Then   α =…

Q: In a survey of 1000 people, 850 said they would not to travel to Disney World this summer. Construct…

A: Given: n=1000 and x=850 Then,p^=xn=8501000=0.85

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

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: In a survey of 1007 parents of children ages 8 to 14, 75% say they are willing to get a second job…

A: Given information- A proportion of parents say they are willing to get a second job or part-time…

Q: A high school counselor is interested in determining factors that contribute to high school drop out…

A: Solution; Given information: n1=41 Sample size of high school  graduatesn2= 38 Sample size of high…

Q: According to a poll taken in a certain​ country, when adults were asked whether they were​ thriving,…

A: Given,n = 440x = 193a) Sample proportion p^ = xn    p^ = 193440 = 0.4386 b)np^ = 440 x 0.4386 =…

Q: 2. In a survey of 1024 US adults, 287 said that their favorite sport to watch is football. a. Find a…

A: It is given that the survey contains 1024 US adults and the number of US adults who favorite sport…

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

A:

Q: Why is a 99% confidence interval wider than a 95% confidence interval?

A: The confidence interval formula is sample statistic±Margin of error. The margin of error is the…

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

A: Given that, X = 118 N = 200 99% confidence level

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: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

A:

Q: Suppose we would like to estimate the proportion of all NBA fans who thought Aaron Gordon won the…

A:

Q: Construct a 95% confidence interval for the proportion of college students who say they own their…

A: Given : n=410 , X=155  , α=0.05 We want to find the 95% confidence interval for the proportion of…

Q: n a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist…

A: Given that : x = 9 n = 48

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: In a recent poll of 200 randomly selected adults in the U.S., 130 were registered to vote. a) What…

A: Hello, thanks for your question. Since you have posted a question with multiple sub-parts, we will…

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

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: In a survey of 32 students at a local high school, 17 support changing the schools mascot. Find the…

A:

Q: In a recent poll, 110 people were asked if they liked dogs, and 40% said they did. Find the margin…

A: For 99% confidence intervalα=1-CI=1-0.99=0.01So, zα2=z0.012=z0.005=2.576

Q: Wisconsin Public Radio wants to duplicate a survey conducted in 2011 that found that 68% of adults…

A: From the provided information, Sample proportion (p̂) = 0.68 The z critical value at 90% confidence…

Q: 3: In a poll of 1000 likely voters, 560 say that the United States spends too little on fighting…

A:

Q: In a taste comparison test, it was found that 56 of the 100 persons in a sample preferred the chunky…

A:

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

A:

Q: Wildlife biologists inspect 200 deer taken by hunters and find 45 of them carrying Lyme disease…

A: Given; x=45n=200Then the sample proportion is given by;p^=45200=0.225The level of significance…

Q: What is the t-value for a 90% confidence interval given that the sample size is 26? Write the exact…

A:

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

A: The formula for the sample size is as follows:

Q: The owner of the Gas station wishes to determine the proportion of customers who use credit card. he…

A:

Q: In a poll of 2,300 likely voters, 966 say that the Philippines spend too little on education. Find…

A: We have given that the sample size n = 2300, favourable cases X =966 and sample proportion p =…

Q: Aston’s Career Service wants to find out what proportion of Aston’s students work in a part-time…

A: From the given information, Population proportion = p = 60% = 0.60 Margin of error = E = 4% = 0.04…

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: ays before the 2016 presidential election, a Loras College poll asked 500 randomly selected likely…

A: The confidence interval indicate that true proportion of voters who favor Donald Trump is 43% which…