Of 2019 employees selected randomly at a company, 10% of them commute by carpooling. Construct a 90% confidence interval for the proportion of all employees of the company who carpool.

Q: . A phase three clinical trial for a new medication proposed to treat depression has 1237…

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Q: In a random sample on 200 airline passengers, 84 said they would like a window seat. What is the…

A: 1. The point estimate for the proportion of passengers wishing a window seat is, p^=xn=84200=0.42…

Q: ) When 415 junior college students were surveyed, 150 said they have a passport. Construct a 95%…

A:

Q: When 460 junior college students were surveyed, 100 said they have a passport. Construct a 95%…

A: Given that there are 460 junior college students and 100 said they have a passport. That is, n=460…

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

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

A:

Q: In a random sample of 170 customers, 90 ordered chicken sandwitches for lunch. Construct a 94%…

A: X = 90 N = 170

Q: A cable company claims that 88% of its customers are fully satisfied with their service. A…

A: Given that  Sample size n =350 Favorable cases x =287 Sample proportion p^=x/n  =287/350 =0.82

Q: In September 2011, Gallup surveyed 1,004 American adults and asked them whether they blamed Barack…

A: It is given that sample size (n) is 1004 and p-hat value is 0.53.

Q: Workers in several industries were surveyed to determine the proportion of workers who feel their…

A: Obtain the 95% confidence interval for the proportion of workers in the industry government sector…

Q: 1. The Hartford Insurance Company wants to estimate the percentage of drivers who change tapes or…

A: Please see the attachment..

Q: company check police records on 590 accident selected at random and notes that the teenagers were at…

A: The sample proportion is computed as follows: The critical value for 95% confidence level, i.e.,…

Q: Of 400 randomly selected medical students, 21 said that they planned to work in a  rural community.…

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Q: Of 380 randomly selected medical students, 210 said that they planned to work in a rural community.…

A: Solution: Let X be the number of medical students said that they planned to work in a rural…

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: 95% confidence interval for the proportion of adults in the United States who say that their…

A:

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: Commerce students were asked if they watch or listen to the state of the nation address (SONA), of…

A: Given: n= 220 ,x= 105 At 90.0 % confidence level , z score= 1.645 Need to find confidence interval…

Q: A survey found that 39 of 66 people who don't drink coffee often have trouble sleeping and 44 of 88…

A: Solution: Let X1 be the number of noncoffee drinkers who have trouble sleeping, n1 be the sample…

Q: In simple random sample of 150 of workers, 22 said their workplace environment is toxic. Construct a…

A: We have to find out given confidence interval..

Q: 7 out of 70 students said they were comfortable with “working in a workplace with a lot of…

A: Given that  57 out of 70 students said they were comfortable with “working in a workplace with a lot…

Q: Alma is estimating the proportion of students in her school district who, in the past month, read at…

A: From the given information, n=50 and x = 32.

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 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: An internet service provider sampled 540 customers and found that 55 of them experienced an…

A:

Q: Identify the y-score for a 95% confidence interval if the sample size is 15.

A: The confidence level is 0.95.

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

A: GIVEN DATA : Total number of golfers are 2480, Number of left handed golfer are 372        TO FIND :…

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: n a trial of 350 patients who received 10-mg doses of a drug daily, 49 reported headache as a side…

A: 350 patients who received 10-mg doses of a drug daily; n=350 49 reported headache as a side effect;…

Q: A phase three clinical trial for a new medication proposed to treat depression has 1191…

A:

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

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Q: In a preelection poll, a pollster finds that 442 out of 650 people polled favor Smith. Construct the…

A: We need to construct the 95% confidence interval for the population proportion. We have given the…

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

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Q: Of 57 bank customers depositing a check, 25 received some cash back. Construct a 90 percent…

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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: Of 124 adults randomly selected from one town, 27 of them smoke.  Construct a 99% confidence…

A: GivenNo. of adults(n)=124No.of them…

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

A:

Q: consider a random sample of 300 students in a university, 75 of them declared that they like playing…

A: A random sample of 300 students in a university in which 75 of them declared that they like playing…

Q: A random sample of 180 men indicated that 50 were smokers, and a random sample of 150 women surveyed…

A: Given; p1=50180=0.28p2=39150=0.26Level of significance=0.02 Confidence interval is given by-…

Q: 2) Suppose a college is planning to hold an event for students. In the survey of 130 on-campus…

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Q: An insurance company checks police records on 570 accidents selected at random and notes that…

A: The 95% confidence interval for the percentage of all auto accidents that involve teenage drivers is…

Q: A study of 150 randomly selected accidents that involved trips to the emergency room found that 36%…

A: Given 99% confidence level, significance level α=1-0.99=0.01

Q: In a survey of 1000 randomly selected adults in the United States, participants were asked what…

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