An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers were satisfied with the services that were offered with a 3.98% margin of error. Answer the following question; What is the upper limit of confidence interval?

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Given data,     P=58%=0.58     E=7%=0.07     z-value at 95% confidence is  zc =1.98     n=?

Q: An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers…

A: Given data: Population proportion = 0.52 Margin of error = 3.98% To calculate: Confidence interval

Q: The figure to the right shows the results of a survey in which 1011 adults from Country​ A, 1003…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

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: In a random sample of 810 women employees, it is found that 81 would prefer working for a female…

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Q: Campus athletics is interested in the proportion of registered students living on campus who play…

A: We are given that 95% confidence interval is correctly calculated from the given data as (0.12,…

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 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 100 voters in a school district, 40 of them stated they were in favor of the…

A: Solution: Let X be the number of voters stated they were in favor of the school district bond…

Q: A certain department store is interested in estimating the average amount its credit card customers…

A: Givensample size(n)=15Mean(x)=2525variance(s2)=20000standard deviation(s)=20000confidence interval =…

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

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

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Q: The. Nielsen television ratings used a random sample of 2,000 homes and found that 45% of the homes…

A:

Q: sample st. dev   Point estimate =                     Margin of the Error =   Show the Formula that…

A: The point estimate can be obtained using the excel formula “=AVERAGE(A1:A28)”. From the Excel…

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

Q: 1992, the women in two statistics classes for students in the liberal arts at a large northeastern…

A: In 1992, the women in two statistics classes for students in the liberal arts at a large…

Q: In order to make the decision for one business, your team constructed a 90% confidence interval, the…

A: For 90% confidence interval, the width of that confidence interval is 500.We have to reduce the…

Q: What happens to the margin of error if you increase the confidence level?

A: We know that, Margin of error=zσn

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

A: (1)

Q: In a previous election, the confidence interval for the proportion of likely voters who would vote…

A: given;confidence interval for the proportion;(0.4401, 0.5199)i.e. (p^-E, p^+E)where  p^ : point…

Q: A random sample of residents in city J were surveyed about whether they supported raising taxes to…

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

Q: Elly and Drew work together to collect data to estimate the percentage of their classmates who own a…

A: Given that Elly and Drew work together to collect the data to estimate the percentage of their…

Q: Select the correct response. a) Given the same sample data, the margin of error in a 90% confidence…

A: a) Given the same sample data, the margin of error in a 90% confidence interval would be smaller…

Q: An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers…

A:

Q: Federal Gas Tax. The Quinnipiac University Poll conducts nationwide surveys as a public service and…

A: a)It is given that:

Q: f n=300 and ˆpp^ (p-hat) =0.18, find the margin of error at a 99% confidence level Give your answer…

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Q: Which of the common confidence levels (90%, 95%, or 99%) would you prefer to use if you wanted to…

A: Introduction: The “smallest” confidence interval implies the confidence interval with the shortest…

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: manager at ACME Equipment Sale and Rental wondered how offering a free two-year service warranty on…

A: a.  All necessary assumptions are met: The sampling method for each population is simple random…

Q: A market analyst is curious what proportion of Los Angeles residents have a landline telephone. A…

A: Given that, A survey of 200 randomly selected Los Angeles residents shows that 96 of those selected…

Q: A Gallup poll asked a sample of Canadian adults if they thought the law should allow doctors to end…

A: (a) The sample proportion of Quebec adults who would allow doctor-assisted suicide is, The critical…

Q: In a harvest of 50 watermelons, farmers prefer at least 72% of watermelons to be classified as…

A:

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

A:

Q: In 2017, the CDC administered the Youth Risk Behavior Survey (YRBS) to a random sample of 14,795…

A: Obtain the 99% confidence interval for the proportion of the high school students have been cyber…

Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

A:

Q: 3. In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: Given : Sample size of people (n) = 300 Let X : No. of people from sample  who said they watched…

Q: In a situation where the sample size was decreased from 39 to 29, what would be the impact on the…

A: The confidence interval depends on the three factors: Confidence level: The width of the…

Q: he Pew Social Media Update 2014 surveyed 1,597 adult internet users on which social media websites…

A: Given information- We have given that Social Media Update 2014 surveyed 1,597 adult internet users…

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: At one large college, 1867 out of the 2500 students surveyed said they plan to take another science…

A: The known values are, p^=1,867/2,500=0.7468, n=2,500. Using standard normal table, the critical…

Q: The table shows the results of a survey in which separate samples of 400 adults each from the East,…

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

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

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Q: In a survey on downloading music, a poll asked 714 Internet users if they "ever downloaded music…

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Q: survey of 40 students at a local college asks, "Where do you buy the majority of your books?" The…

A: The objective is to develop a 99% confidence interval estimate of the proportion of all of the…

Q: Pharmaceutical companies promote their prescription drugs using television advertising. In a survey…

A: Given data: Sample size = 80    x = 10 asked their  physician Confidence level  = 95%

Q: What is the relationship between confidence intervals and hypothesis tests?

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

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 certain department store is interested in estimating the average amount its credit card customers…

A: According to our guidelines we can answer only first question and rest can be reposted.

Q: ays before the 2016 presidential election, a Loras College poll asked 500 randomly selected likely…

A: The confidence interval indicate that true proportion of voters who favor Donald Trump is 43% which…

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.