Most married couples have two or three personality preferences in common. A random sample of 380 married couples found that 124 had three preferences in common. Another random sample of 576 couples showed that 208 had two personality preferences in common. Let p1 be the population proportion of all married couples who have three personality preferences in common. Let p2 be the population proportion of all married couples who have two personality preferences in common. (a) Find a 90% confidence interval for p1 – p2. (Use 3 decimal places.) lower limit   upper limit

Q: Suppose​ that​ 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: we have given that sample size =n=2307 ,sample proportion =p^=18%=0.18

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: Example 1: The Harvard School of Public Health survey found that 2486 of a sample 10,904 college…

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

A: The value of x is 112 and n is 300.

Q: In a survey of 3700 TV viewers, 834 said they watch network news programs. Find the margin of error…

A: Solution

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: In a study of 480 households, 168 households were found to have 4 cell phones. Find a 95% confidence…

A: Given: x=168 n=480 p^=xn=168480=0.35

Q: 3. In a 2009 Gallup Poll, 441 of 507 adults said it was "morally wrong" to clone humans. Assume…

A: Solution : Given :  x = 441              n = 507 Sample proportion is, p = xn = 441507     = 0.8698…

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

A:

Q: If r = 0.7 for the probability and statistics course grades of 30 students, construct a 95%…

A: Confidence interval for correlation coefficient is given by,

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

A:

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: A random sample of 75 college students of MSU is selected and 16 are found to have motorcycles on…

A: From the given information, The sample size is 75. Out of 75 students, 16 are found to have…

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

A:

Q: In a random sample of 810 medical professionals, 81 prefers to work in the evening shift.  The width…

A: Given,n=810x=81p^=xnp^=81810=0.11-p^=1-0.1=0.9α=1-0.95=0.05α2=0.025Z0.025=1.96

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

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

A:

Q: An investigator has calculated a 95 percent confidence interval for a one-sample t test and found:…

A: The 95% confidence interval is obtained as (97, 105).

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

A: X = 90 N = 170

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

A: Given that  Sample size n =120 Favorable cases x =88 Sample proportion p^=x/n  =88/120 =0.7333

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.

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A:

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

A: Given Sample size=300 X=112 At 98% Z is 2.33

Q: An investigative reporter contacts a random sample of hotels, and finds a 95% confidence interval…

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

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Q: A researcher computed a 90% confidence interval for the proportion of students who smoke. If the…

A: False. Relationship between confidence level and error:The error value increases when the confidence…

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

A:

Q: Suppose that 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: The sample proportion is given as 0.18. The sample size is given as 2307. The two-tailed z-critical…

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

A:

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

A: Introduction - Confidence interval for two proportion CI=Sample difference ±critical difference…

Q: In a certain high school, 7 out of 11 juniors said that they planned to go to the winter prom.…

A:

Q: In a statistics activity, students are asked to determine if there is a difference in the proportion…

A: Given : Claim : there is a difference in the proportion of times that a spinning penny will land…

Q: If the number of smokers in a sample of 160 students selected from university A is 56 and the number…

A: From the provided information,

Q: A survey of 503 women shoppers found that 46% of them shop on impulse. What is the 99% confidence…

A: Given : Sample Size, n = 503 confidence level,c=0.99

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: In a study of the relationship between alcohol use and bicycling fatalities, the researcher…

A:

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 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: After surveying 625 potential voters polled, you find out that 325 support candidate X and 300…

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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.

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A: For a known sample proportion, we want an interval to be estimated, which will include the true…

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

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Q: 95% confidence interval for the proportion of college students who have texted during class was…

A: Given that  95% confidence interval=(0.75 , 0.95)

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,

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.