The telephone company has the business objective of wanting to estimate the proportion of households that would purchase an additional telephone line if it were made available at a substantially reduced installation cost. Data are collected from a random sample of 500 households. The results indicate that 135 of the households would purchase the additional telephone line at a reduced installation cost. Construct a 99% confidence interval estimate for the population proportion of households that would purchase the additional telephone line.

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A: From the provided information,Sample size (n) = 2384From which 1247 are weekly online…

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Q: As part of the Pew Internet and American Life Project,, researchers conducted two surveys in late…

A: Given: n1= 800 ,x1= 584 n2= 2253 ,x2= 1059 At 95.0 % confidence level , z score= 1.96 Need to find…

Q: We want to estimate the proportion of vegetarian restaurants in a country. We observe 20 such…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: A sociologist wants to construct a 94% confidence interval for the proportion of teenagers who uses…

A: Given, p=0.23 E=0.02 z value at 94% confidence is Zc=1.88 n=?

Q: In a survey of 2383 U.S. adults, 1073 think there should be more government regulation of banks.…

A: Solution: 1. Let X be the number of U.S. adults think there should be more government regulation of…

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A: The value of z at a 90% confidence level is 1.645, which can be found by using the standard normal…

Q: In a survey of 2113 adults in a recent​ year, 741 made a New​ Year's resolution to eat healthier.…

A:

Q: In a survey of 4052 ​adults, 723 oppose allowing transgender students to use the bathrooms of the…

A: It is given that x = 723 and n= 4,052.

Q: In a survey of 1005 adults 526 stated construct a 95% confidence interval

A:

Q: In a survey of 1400 people, 75% indicated that they listened to their favorite radio station because…

A: In statistical inference there are two branches-1)hypothesis testing and 2)Estimation In estimation…

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

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Q: B2. Consider a quality control inspection. There are 10 products in each box, the number of…

A: There are 10 products The defective can be  0 1 2 Hence, the possibility of the occurrence of…

Q: We want to estimate the proportion of vegetarian restaurants in a country. We observe 20 such…

A: We observe 20 such restaurants out of 100 p⏞ =xn=20100=0.5 90% confidence interval for the…

Q: Jane wants to estimate the proportion of 13 students on her campus 4 who eat cauliflower. After…

A:

Q: You recently sent out a survey to determine if the percentage of adults who use social media has…

A: It is given that sample size (n) is 2,461 and x is 1,702.

Q: 2. n(1-P)= 3. N= If no N is given in the problem, use 1000000 N: Name the procedure The conditions…

A: Point and Interval estimate

Q: qualities as options, one of which is "communicator", as the most important quality for an effective…

A: It is given that  Favourable cases, X = 121 Sample size, n = 275 Sample proportion, p^ = X/n…

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

A: It is given asFavourable cases, x = 20901Sample size, n = 45535Confidence level = 99%

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A: p = proportion of people vote for BSample size : n = 100Number of favorable outcomes : x =…

Q: a survey of 3409 adults, 1445 say they have started paying bills online in the last year.  Construct…

A: The confidence interval = 99%The faovarble cases [x] = 1445The sample size [n] = 3409

Q: In a clinical trial of a certain drug, 30 subjects experience headaches among the 220 subjects…

A: Step 1: State the given: number of favorable cases, x = 30sample size, n = 220confidence level =…

Q: An internet service provider sampled 1000 of its customers, 189 of them experienced an interruption…

A: It is given that sample size (n) is 1000 and x is 189.

Q: According to a report on consumer fraud and identity theft, California had 1439 complaints of…

A: Let x denote the number of complaints of identity theft in California. x=1439 The total number of…

Q: Out of 54 randomly selected patients of a local hospital who were surveyed, 42 reported that they…

A: Given that, The total patients n are 54 and the total patients who were satisfied x are 42.

Q: In a survey of 2782 adults, 1411 say they have started paying bills online in the last year.…

A:

Q: Of 2019 employees selected randomly at a company, 10% of them commute by carpooling. Construct a 90%…

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Q: In a survey of 2334 adults in a recent​ year,1370 say they have made a New​ Year's resolution.…

A: Given n=2334 X=1370

Q: Use the data from this survey to construct a 91% confidence interval estimate of the proportion of…

A:

Q: According to a report on consumer fraud and identity theft, Montana had 1447 complaints of identity…

A: Given that, x=1447,n=3643 The sample proportion is,

Q: Suppose a marketing company computed a 96% confidence interval for the true proportion of customers…

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Q: was the percentage of adults who used social media five years ago. Of the 2703 people who responded…

A: (a) The sample proportion is: p= x/n=1758/2703 =0.65 The value of z at 92% confidence level is 1/75,…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: According to the given information, we have Total number of adult residents sampled = 600 186 had…

Q: In a random sample of 250 high school students, it was found that 85.2% (213) of them later…

A:

Q: A survey conducted by the U.S. department of Labor found the 48 out of 500 heads of households were…

A: Given that, n = 500 x = 48 90% confidence interval

Q: A scientist conducts an experiement with flowers, one sample of flowers consisted of 278 red dahilas…

A: Given that  Sample size n =278 Favorable cases x =108 Sample proportion p^=x/n  =108/278 =0.3885

Q: You recently sent out a survey to determine if the percentage of adults who use social media has…

A: Given  The percentage of adults who use social media 5 years ago  =   62% Out of 2751, 1740 using…

Q: A Gallup poll of 1487 adults showed that 43% of the respondents have Facebook pages.  Construct a…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…