A health magazine is interested in knowing the population proportion of people who eat fast food regularly in a certain country. A study showed that 387 out of 900 people eat fast food regularly. We want to construct a 90% confidence interval for the population proportion of people who east fast food regularly. Find the margin of error. Select one: a. 0.0234 b. 0.0271 c. 0.0142 d. 0.0165

Q: If n=400 and X=100​, construct a 95​% confidence interval estimate for the population proportion.

A: Given,x=100n=400sample…

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

A: Solution

Q: Kim wants to determine a 80 percent confidence interval for the true proportion of high school…

A: Given: Margin of error, E=0.04 Confidence level=80%

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

A:

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

Q: You observe 60 customers at a coffee shop, and 82% of them tip. What is the 95% confidence interval…

A: Given : You observe 60 customers at a coffee shop, and 82% of them tip.

Q: If n = 330 and X = 264, construct a 95% confidence interval for the population proportion, p.

A:

Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

A:

Q: Kim wants to determine a 80 % confidence interval for the true proportion ? of high school students…

A:

Q: If n = 200 and p^ = 0.64, find the margin of error at a 95% confidence level.

A:

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

A:

Q: (c) How large would the sample need to be so that a 95% confidence interval would have a margin of…

A: Given that sample mean xbar=12.05 and population standard deviation=6.55 3) find sample size of…

Q: music fans yields this 95% confidence interval estimate of the proportion of fans who love the music…

A: The sample proportion can be calculated as: Sample Proportion=LowerLimit+UpperLimit2 Thus, Sample…

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: 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 1003 adults from Country A, 1024…

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

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: If n=320 and ˆpp^ (p-hat) =0.26, find the margin of error at a 95% confidence level

A:

Q: A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the 95%…

A: From the provided information Sample size (n) = 600 65% said they received a flu vaccine that is…

Q: A survey of 620620 men shoppers found that 1111% of them shop on impulse. What is the 9595%…

A: Given,sample size(n)=620sample proportion(p^)=0.111-p^=1-0.11=0.89α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: Beth wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: Beth wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Here we need to find the required sample size inorder to construct a 95% confidence interval for the…

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: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: 4. A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the…

A:

Q: Cora wants to determine a 99 percent confidence interval for the true proportion p of high school…

A: Given data: Margin of error (E) = 0.01 Confidence level  = 99 % To find : The required sample size…

Q: In a survey, the planning value for the population proportion is .25. How large a sample should be…

A: We have to find sample size..

Q: Suppose you constructed a 90% confidence interval for the true average GPA of California community…

A: Solution: 1. From the given information, 90% and 80% confidence interval for the true average GPA of…

Q: Cora wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

Q: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

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: 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: 4) Out of the 440 people surveyed, a 110 said they listen to Spotify at least one a month. With the…

A:

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

A: We have given 90% confidence interval for proportion then we have to find the sample size for the…

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

A:

Q: As the sample size gets smaller, what happens to the width of your confidence interval? O Wider /…

A: A confidence interval is an interval with a certain probability that a parameter will fall between…

Q: Beth wants to determine a 90 percent confidence interval for the true proportion p of high school…

A: The required margin of error (E) is less than 0.04. The sample proportion p^ is 0.50 (because…

Q: if n=20, x=43, and s=9, construct a confidence interval at a 98% confidence level, the data came…

A:

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given : Population proportion (p*) = 0.25 Confidence level = 95% So ; significance level (α) =…

Q: In a survey, the planning value for the population proportion is p* = 0.25. How large a sample…

A: Given,sample proportion(p*)=0.25margin of error(E)=0.08α=1-0.95=0.05α2=0.025Z0.025=1.96   (from…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given data, n=195 x=126 p=x/n=126/195=0.646   z-value at 95% confidence is Zc=1.96

Q: Find the confidence level and α for a. a 90% confidence interval. b. a 99% confidence interval.

A:

Q: In a survey, the planning value for the population proportion is p* = 0.35. How large a sample…

A: Find z-critical value. Refer Standard normal table/Z-table OR use excel function…

Q: how many samples out of 100 would you expect to not include the true population mean within their…

A: here given ,  confidence level =  90%  sample size  = 100

Q: If n=17, (x-bar)=44, and s=8, find the margin of error at a 95% confidence level

A: The sample mean is 44 and standard deviation is 8.