In a study of the accuracy of fast-food drive-through orders, a restaurant had 36 orders that were not accurate among 390 orders observed. Use the bootstrap method to construct a 90% confidence interval estimate of the proportion of orders that are not accurate. Use the 200 accompanying bootstrap samples. How does the result compare to the 90% confidence interval 0.068
Q: (a) What is the rat's sample proportion p? What is the large-sample 95% confidence interval for p?…
A: Given: Population size, n = 80 Sample size, x = 80 Sample proportion, p^: p^=8080=1
Q: The humane society selected a random sample of households in its county and used the sample to…
A: From the given information, Let X be the event that number of households had at least one dog. Let 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: Identify the t -scores for a 90% confidence interval if the sample size is 25?
A: Givensample size(z)=25α=1-0.90=0.10α2=0.05
Q: In a survey of 600 personnel directors, 40% thought that they would be hiring new personnel over the…
A:
Q: In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing “strong…
A: Obtain the point estimate for the percentage of all people who experience “strong or extreme fear”…
Q: Construct the requested confidence interval. In a Gallup Poll of 1005 individuals, 452 thought they…
A:
Q: During a flu vaccine shortage in the United States, less than a majority of people were able to…
A: Given data, n=2350 x=978 sample proportion p=xn=9782350=0.4162 z-value at 95% confidence is…
Q: A November 2018 CBS News Poll found that 35% of its sample planned to use online retailers for most…
A: Given that, A November 2018 CBS News Poll found that 35% of its sample planned to use online…
Q: efer to the data set of 20 randomly selected presidents given below. Treat the data as a sample and…
A: From the provided data set, it is clear that out of 20, 11 presidents were taller than their…
Q: The Pew Internet and American Life project reported in 2003 that 18% of Internet users have used it…
A: The appropriate hypothesis for a left tailed test will be H0: p=0.18H1: p<0.18 The sample…
Q: a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell…
A: Given that Sample size n = 420078 Number of cell phone user who developed cancer, X = 130 The…
Q: In a survey of 2002 adults in a recent year, 701 made a New Year's resolution to eat healthier.…
A: Given:
Q: The average total dollar purchase at a convenience store is less than that at a supermarket. Despite…
A: Obtain the 90% confidence interval for the population average amount of purchases. The 90%…
Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…
A: Given: confidence level =95% Sample size n=16 Then degree of freedom for t-test is =n-1 To find…
Q: A telephone company has the business objective of wanting to estimate the proportion of households…
A:
Q: During a flu vaccine shortage in the United States, less than a majority ofpeople were able to…
A:
Q: 1. A poll of 2,500 people shows that 50% approve of a smoking ban in bars and restaurants. What is…
A:
Q: In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing “strong…
A: Given information- We have given that 93 of the 300 subjects reported experiencing “strong or…
Q: A simple random sample of 400 individuals provides 100 Yes responses. a. What is the point estimate…
A: It is given that a random survey, 100 responses (x) in “Yes” in a sample of 400 individuals (n).…
Q: Use the given confidence interval to find the margin of error and the sample mean.
A:
Q: he drug Viagra became available in the U.S. in May 1988, in the wake of an advertising campaign that…
A: A confidence interval estimate is an interval estimate that includes the unknown population…
Q: In a 2009 Gallup Poll, 441 of 507 adults said it was “morally wrong” to clone humans. Assume Gallup…
A:
Q: In our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affordable…
A:
Q: In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to…
A: Here we need to construct a 95% confidence interval.
Q: Using the accompanying colleges and universities data to find 95% confidence intervals for the mean…
A: We first compute the mean and standard deviation for the two groups using excel as below: Liberal…
Q: An online site presented this question, "Would the recent norovirus outbreak deter you from taking…
A:
Q: b.Suppose a similar survey will be given to vaccine-eligible people in Canada by Canadian health…
A: Given data, p=0.5 E=0.02 z-value at 95% confidence is Zc=1.96 n=?
Q: An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers…
A:
Q: After Texas A&M lost again to their rival, the University of Texas, in a football game, the A&M…
A: As nothing is given , p = 0.50
Q: Use the given degree of confidence and sample data to construct a confidence interval for the…
A:
Q: Refer to the accompanying data set of 20 randomly selected presidents. Treat the data as a sample…
A: Given that,
Q: 1. A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…
A: We have given that Sample size n= 500 , favorable cases x=480 Sample proportion p^=x/n=…
Q: A sample of 45 households reveals that 23% have traveled overseas. Is this significantly different…
A:
Q: In a study of the accuracy of fast food drive-through orders, Restaurant A had 317 accurate orders…
A:
Q: An economist at the Florida Department of Labor and Employment needs to estimate the unemployment…
A: Given
Q: In a survey on downloading music, a poll asked 714 Internet users if they "ever downloaded music…
A:
Q: A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to…
A: Solution: Let X be the number of blooms that yield marketable strawberries and n be the sample…
Q: The average total dollar purchase at a convenience store is less than that at a supermarket. Despite…
A: Solution-: Given: We find 90% C.I. for the population
Q: A sample of part time students are asked how many hours per week they work on a job. For the…
A: There are only 5 values in the sample data. Scores: 18 13 12 15 12
Q: According to a poll taken in a certain country, when adults were asked whether they were thriving,…
A: Sample size (n) = 439 240 of them said that they were struggling that is x = 240. The sample…
Q: Data collected by a behavioral risk factor surveillance group revealed that in a state, 27.9% of…
A: Givena)Let p1 and p2 be the proportion of whites and blacks who were cigarette smokers…
Q: A study of 150 randomly selected accidents that involved trips to the emergency room found that 36%…
A: Given 99% confidence level, significance level α=1-0.99=0.01
Q: in a study of the accuracy of fast food drive thru orders, restaurant A had 209 accurate orders and…
A:
Q: Write a statement that correctly interprets the confidence interval. Choose the correct answer…
A: The confidence interval is 0.425<p<0.457.
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: 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,
Q: In a clinical trial among 4441 patients treated with a drug; 5% developed a nausea reaction.…
A:
Step by step
Solved in 2 steps with 2 images
- What is meant by the sample space of an experiment?In a two-proportion study, we have p1= 0.682 with a sample size of 49 and p2= 0.612 with a sample size of 54. What would be the standard error in computing a confidence interval for the difference of proportions?A research group studying cell phone habits asked the question “Do you ever use your cell phone to make a payment at a convenience store?” to people selected from two random samples of cell phone users. One sample consisted of older adults, ages 35 years and older, and the other sample consisted of younger adults, ages 18 years to 34 years. The proportion of people who answered yes in each sample was used to create a 95 percent confidence interval of (0.097,0.125)(0.097,0.125) to estimate the difference (younger minus older) between the population proportions of people who would answer yes to the question. Which of the following is the best description of what is meant by 95 percent confidence? In repeated random sampling with the same sample size, approximately 95% of the sample proportions from the younger group will be between 0.097 and 0.125 greater than the sample proportion from the older group. A In repeated random sampling with the same sample size,…
- Suppose that a safety group surveyed 1,100 drivers. Among those surveyed, 65% said that careless or aggressive driving was the biggest threat on the road, and 25% said that cell phone usage by other drivers was the driving behavior that annoyed them the most. Based on these data and assuming that the sample was a simple random sample, construct and interpret a 95% confidence interval estimate for the true proportion in the population of all drivers who are annoyed by cell phone users. The confidence interval estimate is ??––––––??> (Round to three decimal places as needed. Use ascending order.) Interpret the confidence interval estimate. A. There is a 0.95 probability that the population proportion of drivers who are annoyed by cell phone users is in the interval. B. There is 95% confidence that the population proportion of drivers who are annoyed by cell phone users is in the interval. C. There is 95% confidence that the population proportion…The production manager in an automobile plant is concerned with the number of cars that do not pass the final quality control inspection. In the last two hours he noted that in a sample of 120 cars only 92 were acceptable. The lower and upper limit of a 95% confidence interval for the true percentage of all cars that would not pass the final quality control inspection would be:A telephone company has the business objective of wanting to estimate the proportion of households that would purchase an additional telephone line if it were made available at a reduced installation cost. Data is collected from a random sample of 500 households. The results indicate that 135 of the households would purchase the additional telephone line at a reduced installation cost. - construct a ninety nine percent confidence interval estimate for the population proportion of households that would purchase the additional telephone line.
- 1. A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480were delivered on time. a) Construct a 95% confidence interval for the proportion of all packages that are deliveredon time by the Postal Service.A researcher surveys 50 individuals in Smithville and 40 in Amherst, finding that 30% of smithville residents moved last year, while only 22% of Amherst residents did. Is there enough evidence to conclude that mobility rates in the two communities differ? Use a two-tailored alternative, and a=0.10. Again, find the p-value and a 90% confidence interval for the difference in proportionsDuring a flu vaccine shortage in the United States, less than a majority of people were able to receive the vaccine. The results of a survey given to a random sample of 2,350 vaccine-eligible people indicated that 978 of the 2,350 people had received flu vaccine. a) Construct and interpret a 95 percent confidence interval for the proportion of vaccine-eligible people who had received flu vaccine.
- In a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist attack in their community as “likely” or “very likely”. Use the “plus four” method to create a 98% confidence interval for the proportion of American adults who believe that a terrorist attack in their community is likely or very likely. Interpret your confidence interval.When a survey asked subjects whether they would be willing to accept cuts in their standard of living to protect the environment, 362 of 1180 subjects said yes. a. Construct the 95% confidence interval for the population proportion.It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What is the 90% confidence interval of the true proportion of teenage boys who have received speeding tickets?