A local school board wants to estimate the difference in the proportion of households with school-agedchildren that would support starting the school year a week earlier, and the proportion of households withoutschool-aged children that would support starting the school year a week earlier. They survey a randomsample of 40 households with school-aged children about whether they would support starting the schoolyear a week earlier, and 30 households respond yes. They survey a random sample of 45 households thatdo not have school-aged children, and 25 respond yes. Assuming the conditions for inference have beenmet, what is the 90% confidence interval for the difference in proportions of households that would supportstarting the school year a week earlier?Find the z-table here.0.75(1-0.75), 0.56(1-0.56)O (0.75 - 0.56) ±1.6545400.75(1-0.75) 0.56(1-0.56)O (0.75 - 0.56) ±1.96,8585O (0.75 - 0.56) ±1.65,0.75(1-0.75)0.56(1-0.56)+4045O (0.75 - 0.56) ±1.960.75(1-0.75)0.56(1-0.56)4045

Answered: A local school board wants to estimate…

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 research group conducted an extensive survey of 3093 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1614 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1.3% of the population percentage? (Hint: Use p ≈ 0.52 as a preliminary estimate. Round your answer up to the nearest whole number.) How many workers?
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A research group conducted an extensive survey of 3056 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1529 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1.5% of the population percentage? (Hint: Use p ≈ 0.50 as a preliminary estimate. Round your answer up to the nearest whole number.) ? workers
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A research group conducted an extensive survey of 3193 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?" 1618 responded, "Personal satisfaction from doing a good job." Let p be the population proportion of all wage and salaried workers who would respond the same way to the stated question. How large a sample is needed if we wish to be 95% confident that the sample percentage of those equating success with personal satisfaction is within 1.7% of the population percentage? (Hint: Use p ≈ 0.51 as a preliminary estimate. Round your answer up to the nearest whole number.)
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