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MY NOTES You may need to use the appropriate appendix table or technology to answer this question. Fewer young people are driving. in year A, 61.9% of people under 20 years old who were eligible had a driver's icense. Twenty years later in year e that percentage had dropped to 47.7%. Suppose these resuits are based on a random sample of 1,900 people under 20 years old who were eligible to have a driver's license in year A and again in year b. (a) At 95% conidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answer to four decimal places At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimal places.) (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years eld who had a drivers license in year B (Round your answer to four decimal places.) AL 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year B? (Round your answers to four decimal places.) to (c) Is the margin of error the same in parts (a) and (b) Why or why not? The margin of eror in part (a) isBele than the margin of error in part (b). This is because the sample proportion of eligible people under 20 years old who had a driver's icense in year Bis Select than the sample proportion of eligibie people under 20 years old who had a driver's license in year A. This leads to a Balect interval estimate in part (b). Need Help? Submit Arwer View Previnus Question Question 8 of8

MY NOTES You may need to use the appropriate appendix table or technology to answer this question. Fewer young people are driving. in year A, 61.9% of people under 20 years old who were eligible had a driver's icense. Twenty years later in year e that percentage had dropped to 47.7%. Suppose these resuits are based on a random sample of 1,900 people under 20 years old who were eligible to have a driver's license in year A and again in year b. (a) At 95% conidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answer to four decimal places At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimal places.) (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years eld who had a drivers license in year B (Round your answer to four decimal places.) AL 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year B? (Round your answers to four decimal places.) to (c) Is the margin of error the same in parts (a) and (b) Why or why not? The margin of eror in part (a) isBele than the margin of error in part (b). This is because the sample proportion of eligible people under 20 years old who had a driver's icense in year Bis Select than the sample proportion of eligibie people under 20 years old who had a driver's license in year A. This leads to a Balect interval estimate in part (b). Need Help? Submit Arwer View Previnus Question Question 8 of8

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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MY NOTES You may need to use the appropriate appendix table or technology to answer this question. Fewer young peopie are onving. In year A, 61.9% of people under 20 years old who were eligible had a driver's license, Twenty vears later in year 8 that percentage had dropped to 47.7%. Suppose these resuits are based on a random sample of 1,900 people under 20 years old who were eligible to have a driver's license in year A and again in year B. (a) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answer to four decimal places) At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimai places.) to (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year 87 (Round your answer to four decimal places.) At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a drivers license in year B? (Round your answers to four decimal places.) (c) Is the margin of error the same in parts (a) and (b)? Why or why not? The margin of error in part (a) isSelec than the margin of error in part (b). This is because the sample proportion of eligible peopie under 20 years old who had a driver's icense in year Bis Salect than the sample proportion of eligible people under 20 years old who had a driver's lcense in year A. This leads to aBalect interval estimate in part (b). Need Help? Ree Submit Answer View Previous Question Question 8 of8
Transcribed Image Text:MY NOTES You may need to use the appropriate appendix table or technology to answer this question. Fewer young peopie are onving. In year A, 61.9% of people under 20 years old who were eligible had a driver's license, Twenty vears later in year 8 that percentage had dropped to 47.7%. Suppose these resuits are based on a random sample of 1,900 people under 20 years old who were eligible to have a driver's license in year A and again in year B. (a) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answer to four decimal places) At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a driver's license in year A? (Round your answers to four decimai places.) to (b) At 95% confidence, what is the margin of error of the number of eligible people under 20 years old who had a driver's license in year 87 (Round your answer to four decimal places.) At 95% confidence, what is the interval estimate of the number of eligible people under 20 years old who had a drivers license in year B? (Round your answers to four decimal places.) (c) Is the margin of error the same in parts (a) and (b)? Why or why not? The margin of error in part (a) isSelec than the margin of error in part (b). This is because the sample proportion of eligible peopie under 20 years old who had a driver's icense in year Bis Salect than the sample proportion of eligible people under 20 years old who had a driver's lcense in year A. This leads to aBalect interval estimate in part (b). Need Help? Ree Submit Answer View Previous Question Question 8 of8
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