Suppose a random sample of 459 married couples found that 307 had two or more personality preferences in common.  In another random sample of 471 married couples it was found that only 31 had no preference in common.  Let p1 be the population proportion of all married couples who have two or more personality preferences in common.  Let pw be the population proportion of all married couples who have no personality preferences in common.  Find the 95% confidence interval for p1- p2

Q: Use the Student's t distribution to find t, for a 0.95 confidence level when the sample is 27.

A: sample size=n=27 Degree of Freedom=n-1=27-1 =26 Confidence level is 0.95 Therefore the Level of…

Q: It was observed that 30 of the 100 randomly selected students smoked. Find the confidence interval…

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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: Construct a 98% confidence interval for the difference between the population proportions.

A: For women, sample size n1 = 300, number of women who favored stricter gun control legislation, X1 =…

Q: Of 363 randomly selected medical students, 20 said that they planned to work in a rural community.…

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Q: A sample survey finds that 30% of a sample of 880 Ohio adults said good health was the thing they…

A:

Q: The figure to the right shows the results of a survey in which 1013 adults from Country A, 1001…

A: Given data for country C is        n=1021        P=25%=0.25       Z- value at 95% confidence…

Q: The figure to the right shows the results of a survey in which 1013 adults from Country A, 1001…

A:

Q: It was observed that 30 out of 100 randomly selected students smoked. Estimate the 95% confidence…

A: Given,sample size(n)=100no.of students smoked(x) =30sample proportion(p^)=xnsample…

Q: The figure to the right shows the results of a survey in which 1018 adults from Country A 1015…

A: Given Information: Country Sample size (n) Sample proportion (p^) A 1018 0.37 B 1015 0.19 C…

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: nd a 90% confidence interval for for the probability of success θ in a Bernoulli trial with n=48.

A: Confidence interval: It is defined as the range that contains the value of the true population…

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

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: The figure to the right shows the results of a survey in which 1003 adults from Country A, 1024…

A: Given information For country A p-hat = 0.35 n = 1003

Q: a 90% confidence interval for for the probability of success in a Bernoulli trial with n=48

A: Confidence interval: It is defined as the range that contains the value of the true population…

Q: In a random sample of 850 consumers. 385 reported that they were able to purchase a Playstation 5.…

A: According to the given information, we have In a random sample of 850 consumers. 385 reported that…

Q: If n=160 and ˆp (p-hat) =0.48, find the margin of error at a 99% confidence level

A: Given Data: p^=0.48n=160   We know that, p^-pp^(1-p^)n~ Normal(0,1)

Q: Gallup is a company that carries out daily opinion polls on a variety of topics. In a recent daily…

A: The confidence interval can be found by using the formula p±zp(1-p)n

Q: A simple random sample of 120 vet clinics in the Midwest reveals that the vast majority of clinics…

A: Given that; Sample size (n) = 120  X = 88  At 90% confidence interval .

Q: A random sample of 242 elephants who are in a preserve in Kenya were selected and 85 identified as…

A: Obtain the 95% confidence interval for the difference between the proportions The 95% confidence…

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A: Given Data: x=1000 n=1450   p^=10001450=0.6897   z-value corresponding to 95% Confidence…

Q: The figure to the right shows the results of a survey in which 1005 adults from Country​ A, 1023…

A: From the provided information, Sample size of Country B (n) = 1023 Sample proportion (p̂) = 0.22…

Q: A random sample of 200 female high school students in India showed that 110 are on Facebook. A…

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Q: A survey found that 33 of 66 randomly selected women and 37 of 66 randomly selected men follow a…

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Q: A random sample of 274 elephants who are in a preserve in Kenya were selected and 94 identified as…

A: The sample proportions are Critical values: By using the standard normal table of Z, the critical…

Q: Suppose a random sample of 459 married couples found that 307 had two or more personality…

A:

Q: In a 2009 Gallup Poll, 441 of 507 adults said it was “morally wrong” to clone humans. Assume Gallup…

A:

Q: A sample of part time students are asked how many hours per week they work on a job. For the…

A: Given: n=5

Q: From a survey of 350 coworkers you find that 231 would like the company to provide on-site daycare.…

A: Given that,  Sample size is n= 350  And we find 231 would like the company to provide on-site…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence…

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Q: A past survey of 1,068,000 students taking a standardized test revealed that 8.5% of the students…

A: Solution: From the given information, n1=1,068,000, p1-hat=0.085, n2=1,476,000 and p2-hat=0.092. The…

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: Note- Here I am taking the sample size as 380 because then only the answer will match with the given…

Q: The figure to the right shows the results of a survey in which 1005 adults from Country​ A, 1023…

A: For the given data The99​%confidence interval for the proportion of adults from Country B who say…

Q: A survey of 300 union members in New York State reveals that 112 favor the Republican candidate for…

A:

Q: A random sample of students at a college shows that 54 of 200 students had part-time jobs. Which of…

A: It is given that x is 54 and n is 200.

Q: The figure to the right shows the results of a survey in which 996 adults from Country A, 1006…

A:

Q: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level

Q: The figure to the right shows the results of a survey in which 1005 adults from Country​ A, 1023…

A: For the given data Construct a 99​% confidence interval for the population proportion of adults s…

Q: The figure to the right shows the results of a survey in which 999 adults from Country A, 1002…

A:

Q: A survey of 300 union members in New York State reveals that 112 favor the Republican candidate for…

A:

Q: Suppose an insurance company randomly surveyed 853 drivers and found that 725 claimed they always…

A: From the provided information, Sample size (n) = 853 Out of which 725 claimed they always buckled…

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: In a recent poll, 19% of respondents answered option A. The margin of sampling error was plus or…

A: Given information- The percentage of the population answered A is, p = 19% The margin of error, E…

Q: Suppose you didn’t know whether the coin was fair or not and you wanted to determine a 95%…

A: It is given that sample size (n) is 16,000 and x is 8040.

Q: The figure to the right shows the results of a survey in which 1003 adults from Country A, 1024…

A: Given information For country A p-hat = 0.35 n = 1003

Q: The figure to the right shows the results of a survey in which 1013 adults from Country A, 1001…

A:

Q: The figure to the right shows the results of a survey in which 1014 adults from Country A, 1012…

A: Hello there! There are more than three subparts in the question. According to our policies can…

Q: Of 500 randomly selected college students, 200 use a particular brand of mobile phone. Assuming that…

A: Given : x = 200 n = 500 p^=xn=200500=0.4The formula for confidence interval is :p^±zcp^(1-p^)n