A local school board wants to determine the proportion of households in the district that would support a proposal to start the school year a week earlier. They ask a random sample of 100 households whether they would support the proposal, and 62 households stated that they would. Assuming that conditions have been met, what is the 90% confidence interval for the true proportion of households that would support the proposal?

Q: According to the same Pew Internet study, 8% of those with broadband connections are using fixed…

A: The p-value of the test is 0.103. The decision is fail to reject H0.

Q: (a) What is the rat's sample proportion p? What is the large-sample 95% confidence interval for p?…

A: Given: Population size, n = 80 Sample size, x = 80 Sample proportion, p^: p^=8080=1

Q: To assess the effectiveness of a kindergarten-readiness program, 15 children from a random sample…

A:

Q: A New York Times/CBS poll asked the question, "What do you think is the most important problem…

A: Given that p =0.24 E=0.027

Q: 12. In a sample of 600 Canadians, 265 say they would rather retire in the US than in Canada.…

A:

Q: A random sample of 50 employees of a large company was asked the question, "Do you participate in…

A:

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: In response to a recent GSS survey on whether the Government should impose strict laws to prohibit…

A: Solution: Let X be the number of subjects said “yes” and n be the sample number of subjects. From…

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

A:

Q: 3) A corporation employs 148 sales representatives. A random sample of 60 of them was taken, and it…

A: The sample proportion is computed as follows,

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: Which of these facts would tell us that the pamphlet needs to be updated? If an appropriate…

A:

Q: In a random sample of 100 voters in a school district, 40 of them stated they were in favor of the…

A: Solution: Let X be the number of voters stated they were in favor of the school district bond…

Q: Suppose that a national poll of 300 registered Republicans was conducted this week and 165 stated…

A: Given that, Suppose that a national poll of 300 registered Republicans was conducted this week and…

Q: The national Council of Small Businesses wishes to construct a 95% confidence interval for the…

A: In this question, it has been given that margin of error = 0.10,Level of significance = 0.05,We have…

Q: 1. In a recent poll 62 out of 149 randomly chosen students at Allen High School say they plan to buy…

A:

Q: In a study of 120 randomly selected families, 50 said they streamed their television content. Find…

A:

Q: random digit dialing telephone system was used to conduct a survey asking 3230 city residents; "do…

A:

Q: 1. A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are…

A: Here use confidence interval for population proportion

Q: A random sample of 50 employees of a large company was asked the question, "Do you participate in…

A:

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

A: Solution:There is no estimates available, hence the sample proportion is assumed to be 0.50.The…

Q: A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the 95%…

A: From the provided information Sample size (n) = 600 65% said they received a flu vaccine that is…

Q: Suppose that a safety group surveyed 800 drivers. Among those​ surveyed, 83​% said that careless or…

A: Given Information :  Suppose that a safety group surveyed 800 drivers. Among those​ surveyed, 83​%…

Q: You drop by your local independent coffee shop on your way to class. While standing in​ line, you…

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: 2, A recent survey asked San Diego residents the following question: "If you had been aware that…

A:

Q: A regional survey of 561 companies asked the vice president of operations how satisfied he or she was…

A:

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

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: A Gallup poll asked a sample of Canadian adults if they thought the law should allow doctors to end…

A: (a) The sample proportion of Quebec adults who would allow doctor-assisted suicide is, The critical…

Q: n our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affordable…

A: Given that, n=255,x=75

Q: If he wants to limit the margin of error of his 98% confidence interval to 3%, what is the minimum…

A:

Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

A:

Q: 1. In a poll of 2,500 likely voters, 966 say that the Philippines spend too little on education.…

A:

Q: Telemarketers obtain names and telephone numbers from several sources. To determine whether one…

A: From the provided information,

Q: In a survey on downloading music, a poll asked 714 Internet users if they "ever downloaded music…

A:

Q: A random sample of accountants were asked whether they double-check their calculations on a tax…

A: Here the sample proportion is given by, p^ Therefore α level confidence interval is given by, p^ -…

Q: A poll conducted in January 2020 surveyed likely democrat primary voters about who they would vote…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: a) Using a sample size of 75, construct a 95% confidence interval estimate of the mean birth weight…

A: here given ,  A study has been conducted to verify the mean of birth weight at Apple County. From…

Q: Find the 98% confidence interval for the true difference in population proportions, pˆ A − pˆ B.

A: Given that For drug A, sample size n1 = 50, number of animals showed undesirable side effects, X1 =…

Q: The Marist Poll published a report stating that 66% of adults nationally think licensed drivers…

A:

Q: b. Construct a 90% confidence interval for the percentage of all judges who are in favor of the…

A: a. A random sample of 15 judges and asked them whether or not they favor the death penalty in which…

Q: 12. In a sample of 500 Canadians, 275 say they would rather retire in the US than in Canada.…

A: From the given information, Consider, X be the random variable that denotes the number of people who…

Q: The Universal Music Group is the music industry leader worldwide in sales according to the company…

A: The random variable music sales follow normal distribution. The sample size is 1003. The sample…

Q: Suppose that a safety group surveyed 1,100 drivers. Among those​ surveyed, 65​% said that careless…

A: Obtain the confidence interval estimate for the true proportion in the population of all drivers who…

Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

A: Critical value: Using Excel formula "=NORM.S.INV(1-(0.1/2))", the z-value is obtained as 1.645.

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

A: Sample size (n) = 439 240 of them said that they were struggling that is x = 240. The sample…

Q: A random sample of 80 people was selected, and 22 of the selected people indicated that it would be…

A: Given information: Sample size n=80 Number of selected people who indicated that it would be a good…

Q: In a survey of 900 adults, 240 said that they watched the World Cup final on television. Using these…

A: Given, The sample proportion is,

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

A: Givensample size(n)=200x=118p^=xn=118200=0.59Confidence interval = 99%

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.