n a sample of 500 Canadians, it was found that 400 people preferred apple products. In a sample of 700 Americans it was found that 600 preferred apple products. Is the proportion Canadians who prefer apple products less than Americans. 1. Construct 95% confidence interval for difference of proportions. 2. From the confidence interval, do you think that the proportion of Canadians who prefer apple products is different from Americans.

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Q: The figure to the right shows the results of a survey in which 1001 adults from Country​ A, 1002…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: A poll conducted in 2013 found that 52% of U.S. adult Twitter users get at least some news on…

A: The proportion of the twitter users that gets at least some news is 0.52. Since the required…

Q: A recent study was conducted in which a random sample of men and a random sample of women were…

A: Given:  Confidence Interval = (0.133,0.207) = (13.3%, 20.7%)

Q: A recent study among 120 street hawkers in Johannesburg showed that 42 of them are of the opinion…

A:

Q: A May 2000 Gallup poll found that 38% of a random sample of 1012 adults in the United States said…

A: (a)   Obtain the 96% confidence interval to estimate the true proportion of all U. S. adults who…

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Q: You have recently had a debate with a friend about who uses smartphones the most. Your friend…

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Q: If a 90% confidence interval for the mean is found to be (1.25,4.75) using a sample of n=100, find…

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Q: Cameron and Bailey each take random samples and construct 90% confidence intervals for the…

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Q: 1) A consumer magazine polls cell-phone-users to see if they are happy with their phones and would…

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Q: A random sample of 360 medical doctors showed that 106 had a solo practice. As a news writer, how…

A: Obtain the percentage of medical doctors in solo practice. The percentage of medical doctors in solo…

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: using the confidence interval method, to test that population mean equals 14, a researcher obtains…

A: Solution: State the hypotheses. Null hypothesis: H0: µ=14. That is, the population mean is equal to…

Q: Find a 95% confidence interval for the proportion of renters.

A: It is given that  Favourable cases, X = 360 Sample size, n = 600 Confidence interval = 95%

Q: For a group of 45 students taking a PSDTF test, the mean heart rate was 96 beats per minute, and the…

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Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

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Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: Julia wonders if people living in the eastern part of her country are more likely to respond…

A: Given  n1=100 , X1=80 , n2=100 , X2=60 Zc=1.96, at alpha=0.05 Find 95% confidence interval

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

A: Please see the attachment..

Q: A human resource manager wants to see if there is a difference in the proportion of minority…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: The figure to the right shows the results of a survey in which 999 adults from Country​ A, 1006…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: What proportion of college students earn their undergraduate degrees in four years? A college…

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Q: In a survey of 1000 randomly selected adults in the US, participants were asked what their most…

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Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A:

Q: A high school counselor is interested in determining factors that contribute to high school drop out…

A: Solution; Given information: n1=41 Sample size of high school  graduatesn2= 38 Sample size of high…

Q: 2. In a survey of 1024 US adults, 287 said that their favorite sport to watch is football. a. Find a…

A: It is given that the survey contains 1024 US adults and the number of US adults who favorite sport…

Q: n 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the…

A: Given, confidence level = 1 - α = 0.98       To find, Z value for 98% confidence level.

Q: In the previous example, you learned that the 95% confidence interval for the true proportion of all…

A: Calculate the point estimate and margin of error used to create this confidence interval.

Q: students like other American adults? a. A university dean wants to estimate the percentage of…

A: Given that : It is thought that 61% of American adults drink alcohol of one kind or another.

Q: A poll summarized the results of a survey of 2,400 adults and 500 teens aged 13 to 17. It was…

A: From the provided information,

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Q: In a survey of 7000 women,4431 say they change their nail polish once a week. construct a 95%…

A: Given: Total number of women = n = 7000, Number of women said that they change their nail polish…

Q: A philanthropic organization sent free mailing labels and greeting cards to a random sample of…

A:

Q: People were surveyed worldwide, being asked the question "How important is acquiring wealth to you?…

A: The sample proportion is calculated using the formula:

Q: The Pizza Shop wanted to determine what of its customers ordered an only cheese pizza. Out of 90…

A:

Q: Wisconsin Public Radio wants to duplicate a survey conducted in 2011 that found that 68% of adults…

A: From the provided information, Sample proportion (p̂) = 0.68 The z critical value at 90% confidence…

Q: A recent study of 750 internet users in Europe found that 35% of internet users were women. What is…

A: It is given that the study of 750 internet users in Europe found that 35% of internet users were…

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 240…

A: Sample mean = x̅ = 240 Sample size = n = 12 Sample S.D = s = 16.5

Q: At one large college, 660 out of the 1500 students surveyed said they plan to take another science…

A: Given that,   x=660,n=1500 The sample proportion is, Critical values: By using the standard normal…

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

A:

Q: Suppose a marketing company randomly surveyed 404 households and found that in 214 of them, the…

A: Given N=404 Pcap=0.53

Q: Melissa wants to estimate the proportion of adults in the U.S. who own a gun. To do so, she surveys…

A: Given information: Sample size of adults is 45, that is, n = 45. Number of adults who own a gun is…

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: In a survey of 3299 adults aged 57 through 85​ years, it was found that 82.2​% of them used at least…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: Flagstaff found 470 NAU students who drink coffee daily. Find a 95% confidence interval for the true…

A: Given

Q: A survey was conducted to determine the proportion of adults who approve of attempts to clone a…

A: Given,   Lower bound = 0.09 Upper bound = 0.13   The objective is to find the point estimate of the…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.