In a recent Dew Research Poll, 500 U.S. adults were asked about their online versus in-store clothes shopping. One finding was that 32% of respondents never clothes-shop online. Construct and interpret a 95% confidence interval for the proportion of all U.S. adults who never clothes-shop online.

Q: A June 2020 Angus Reid poll of 1510 Canadian adults found that 53% support the idea of a 30 hour…

A: Given Data: p^=0.53n=1510   z-value corresponding to 95% Confidence level=1.96

Q: During a flu vaccine shortage in the United States, less than a majority of people were able to…

A: Given data, n=2350 x=978 sample proportion p=xn=9782350=0.4162   z-value at 95% confidence is…

Q: According to a Harris Interactive survey of 2401 adults conducted in April 2009, 25% of adults do…

A:

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: In August 2004, Time magazine, reporting on a survey of men’s attitudes, noted that “Young men are…

A: It is given that out of 129 surveyed 18-24 year old men, 80 said they were comfortable talking about…

Q: When a survey asked subjects whether they would be willing to accept cuts in their standard of…

A: It is given that 362 out of 1,180 subjects respond yes.The sample proportion is 362/1,180 =…

Q: In a poll conducted by the Gallup organization in April 2013, 48% of a random sample of 1022 adults…

A: Obtain the 95% confidence interval for the proportion of all U.S. adults in April 2013 who felt that…

Q: Of 118 randomly selected adults, 34 were found to have high blood pressure. Construct a 95%…

A: According to the given information, we have Total number of adults = 118 34 were found to have high…

Q: In a study of 200 accidents that required treatment in an emergency room, 80 occurred at work. Find…

A: Obtain the 90% confidence interval for the true proportion of accidents that occurred at work. The…

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

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Q: Suppose in a recent poll of 1250 randomly selected Californians who took vacations, 132 of them…

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Q: The research group asked the following question of individuals who earned in excess of $100,000 per…

A: The random variable percentage of who believe it is morally wrong for unwed women to have children…

Q: In a recent survey of 200 households, 172 had central air conditioning.  Find the 85% confidence…

A: Given that In a recent survey of 200 households, 172 had central air conditioning That is…

Q: Out of 156 Nielsen families surveyed about their viewing habits, 43 felt that television was too…

A: We have given that,  Favorable cases (X) = 43 and sample size (N) = 156  Then,  We will find the 99%…

Q: In a Gallup Poll of 1005 individuals, 452 thought they were better off financially than a year ago.…

A: Given; p=452n=1005 95% confidence interval is given by- p^±z×p^(1-p^)n true proportion is given as-…

Q: Is the difference between the two indicators significant at the 95% confidence level?

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Q: a recent study of 100 people in Burlingame found that 19 were obese.  Find the 90% confidence…

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Q: A Gallup Youth Survey in 2001 found that of 501 randomly selected teenagers in the U.S., 271 of them…

A: Given Total number of teenagers selected = 501Number of teenagers said who get along with their…

Q: A survey found that out of 900 workers, 150 said they were interrupted by frank phone calls. Find…

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Q: In a study of 150 randomly selected accidents that required treatment in an emergency room, 36%…

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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: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: Given :confidence level = 90% confidence interval = (0.24,0.4) p is unknown, so p=0.5 We want to…

Q: A medical researcher claims that smoking can result in the wrinkled skin around the eyes. The…

A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

Q: In the Framingham Offspring study 3630 subjects were on anti-hypertensive medication out of 4657…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: In a recent poll, 240 people were asked if they liked dogs, and 32% said they did. Find the margin…

A: Find z-critical value:…

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: In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies.…

A: Givenx=115n=390p^=xn=115390=0.2949confidence interval = 90%

Q: The following table shows the results of a survey in which 1017 adults from the United States, 1060…

A: (1)

Q: in a random sample of 800 austin automobile owners, it was found that 480 would like to see the size…

A: We have to find given ci.

Q: : A study was done to compare the effectiveness of distance learning with traditional classroom…

A: Given that

Q: In a sample of 600 Ottawa families, it is found that 360 rent their dwellings while 240 own their…

A: It is given that sample size (n) is 360 and x is 240.

Q: in a random sample of 192 college students, 129 had part-time jobs. Find the margin of error for the…

A:

Q: A marketing study by Ford Motor Company finds that 320 of the 650 buyers of compact cars were women.…

A: Let the population proportion of women who bought compact cars be P Given:         Sample size n =…

Q: 1. A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: We have given that  Sample size n= 500 , favorable cases x=480 Sample proportion p^=x/n=…

Q: In a recent questionnaire about homeownership, a random sample of 545 homeowners were asked about…

A:

Q: Would represent a 90% confidence interval for the average highway mileage of all Smart Cars?

A: we need to find the confidence interval of the mean GIVEN mean=47 S.D=5 n=15

Q: Researchers at the National Cancer Institute released the results of a study that examined the…

A: Given ,  (1-α)100% = 95% α = 0.05

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: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: It is given that a simple random sample of 339 people living in East Vancouver and finds that 40…

Q: Use the accompanying Grade Point Averages data to find 80%, 85%, and 99% confidence intervals for…

A: The degrees of freedom is, df=n-1=30-1=29 The degrees of freedom is 29. Computation of critical…

Q: In a recent poll, 410 people were asked if they liked dogs, and 44% said they did. Find the margin…

A: n = 410 p^=0.44 Confidence interval = 95%

Q: Do younger people use Twitter more often than older people? In a random sample of 316 adult Internet…

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Q: A recent survey of 1,000 people found that 90% of Americans support background checks for purchasing…

A:

Q: Suppose you needed to form a 92% confidence interval for a population mean. What z value would you…

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Q: confidence interval for the true proportion

A: We have to find out the confidence interval for the true proportion.

Q: A survey found that out of 800 workers, 150 said they were interrupted by frank phone calls. Find…

A: Given,n=800x=150p^=xnp^=150800=0.18751-p^=1-0.1875=0.8125α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What…

A: Given data ,n=90P=70%=0.7The z-value at 90% confidence is1.645=z∝12=1.645

Q: For what type of variable does it make sense to construct a confidence interval about a population​…

A: Qualitative variable: A variable which cannot be measured in numerically is known as a Qualitative…

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.