A random sample of ni = 270 people who live in a citywere selected and 99 identified as a "dog person." Arandom sample of n2 = 108 people who live in a rural areawere selected and 51 identified as a "dog person." Find the%3D98% confidence interval for the difference in theproportion of people that live in a city who identify as a"dog person" and the proportion of people that live in arural area who identify as a "dog person."Round answers to to 4 decimal places.< pi – P2 <-

Answered: Image /qna-images/answer/e8f6e771-479d-4f10-b9eb-574e081064a3.jpg

Answered: A random sample of ni = 270 people who…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A survey by the society of Human Resource Management asked 350 job seekers why employees change jobs so frequently. The answer selected most (126 times) was "higher compensation elsewhere" as the reason for changing jobs. Then the 95% confidence interval estimate for the population proportion of job seekers who would select "higher compensation elsewhere" as the reason for changing jobs is approximately.
A study was done to determine whether there is a relationship between snoring and the risk of heart disease. Among 1,105 snorers in the study, 88 had heart disease, while only 27 of 1,379 non-snorers had heart disease. (a) Determine a 95% confidence interval that estimates p1 − p2 = difference in proportions of snorers and non-snorers who have heart disease. (Let p1 be the proportion of snorers and p2 be the proportion of non-snorers. Round your answers to three decimal places.) to
of 101 randomly selected mothers, 17% indicated that they pay for private preschool, what is the 99% confidence interval for the proportion of mothers that pay for private preschool
A sample of 1200 females and 1000 males found that 78.3% of females and 35.1% males supported increased funding of arts. Construct a 90% confidence interval around the difference in proportions.
A statistical study is made to compare the % of smokers in small rural towns to the overall smoking rate of the US. Of 1500 asults selected randomly from small towns it is found that 285 of them smoke. With a cofidence interval of (017, 0.21). The CDC reports that 15.1% of all American adults smoke. Does the confidence interval suggest that smoking rate is higher in small towns than in the country overall?
Researchers are studying whether the proportion of homeschooled children in district 1 (considered 1) is less than the proportion of homeschooled children in neighboring district 2 (considered as 2). To test the theory info was gathered: district 1 had 600 students of which 90 were homeschooled. District 2 had 550 students of which 99 were homeschooled. What is the 95% confidence interval for the difference proportion between district 1 and 2? A. (-0.086, 0.026) B. (0.143, 0.217) C. (0.113, 0.187)
A recent survey of two countries in South America reports on data about foreign-born citizens. Of 500 randomly selected people in Peru, 125 reported as being born in another country; meanwhile, 75 of 800 randonly selected Argentinians reported as being foreign-born. Use this information to create a 95% confidence interval for the true difference in proportions of foreign born citizens between Peru and Argentina.
Genetic studies have shown that 4% of Americans with European descent also have African ancestry. A random sample of DNA from 500 Americans has been chosen, calculate a 95% confidence interval for the proportion of Americans that with European descent who also have African ancestry. Genetic studies have shown that 4% of Americans with European descent also have African ancestry. A random sample of DNA from 500 Americans has been chosen, calculate a 95% confidence interval for the proportion of Americans that with European descent who also have African ancestry. (1.92%, 1.581%) (-0.23%, 1.826%) (2.282%, 5.718%) (1.742%, 6.257%)
A researcher studying reaction time of drivers states that, "A 95% confidence interval for the mean time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him is 1.2 to 1.8 seconds." What are the point estimate and margin of error for this interval? Point estimate = 1.5 seconds; margin of error = 0.95 seconds. Point estimate = 1.2 seconds; margin of error = 0.3 seconds. Point estimate = 1.5 seconds; margin of error = 0.6 seconds. Point estimate = 1.5 seconds; margin of error = 0.3 seconds. a O b O d
A study was done to determine whether there is a relationship between snoring and the risk of heart disease. Among 1,105 snorers in the study, 85 had heart disease, while only 21 of 1,379 nonsnorers had heart disease. In USE SALT (a) Determine a 95% confidence interval that estimates p, - p2 difference in proportions of snorers and nonsnorers who have heart disease. (Let p, be the proportion of snorers and p, be the proportion of nonsnorers. Round your answers to three decimal places.) |-0.079 X to -0.045
A study of 420,064 cell phone users found that 136 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0343% for those not using cell phones . Use the sample data to construct 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system.

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