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In a study in Scotland (as reported by Devlin 2009), researchers left a total of 320 wallets around Edinburgh, as though the wallerts were lost. Each contained contact information including an address. Of the wallets, 146 were returned by the people who found them. With the following steps, use the data to estimate the proportion of lost wallets that are returned, and give a 95% confidence interval for this estimate. What is the observed proportion of wallets that were returned (rounded to the nearest thousandths)? Calculate P to use in the Agresti-Coull method of calculating a 95% confidence interval for the population proportion (rounded to the nearest thousandths). Calculate the lower bound of the 95% confidence interval (rounded to the nearest thousandths). Calculate the upper bound of the 95% confidence interval (rounded to the nearest thousandths).

In a study in Scotland (as reported by Devlin 2009), researchers left a total of 320 wallets around Edinburgh, as though the wallerts were lost. Each contained contact information including an address. Of the wallets, 146 were returned by the people who found them. With the following steps, use the data to estimate the proportion of lost wallets that are returned, and give a 95% confidence interval for this estimate. What is the observed proportion of wallets that were returned (rounded to the nearest thousandths)? Calculate P to use in the Agresti-Coull method of calculating a 95% confidence interval for the population proportion (rounded to the nearest thousandths). Calculate the lower bound of the 95% confidence interval (rounded to the nearest thousandths). Calculate the upper bound of the 95% confidence interval (rounded to the nearest thousandths).

MATLAB: An Introduction with Applications
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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In a study in Scotland (as reported by Devlin 2009), researchers left a total of 320 wallets around Edinburgh, as though the wallerts were lost. Each contained contact information including an address. Of the wallets, 146 were returned by the people who found them. With the following steps, use the data to estimate the proportion of lost wallets that are returned, and give a 95% confidence interval for this estimate. What is the observed proportion of wallets that were returned (rounded to the nearest thousandths)? Calculate P to use in the Agresti-Coull method of calculating a 95% confidence interval for the population proportion (rounded to the nearest thousandths). Calculate the lower bound of the 95% confidence interval (rounded to the nearest thousandths). Calculate the upper bound of the 95% confidence interval (rounded to the nearest thousandths).
Transcribed Image Text:In a study in Scotland (as reported by Devlin 2009), researchers left a total of 320 wallets around Edinburgh, as though the wallerts were lost. Each contained contact information including an address. Of the wallets, 146 were returned by the people who found them. With the following steps, use the data to estimate the proportion of lost wallets that are returned, and give a 95% confidence interval for this estimate. What is the observed proportion of wallets that were returned (rounded to the nearest thousandths)? Calculate P to use in the Agresti-Coull method of calculating a 95% confidence interval for the population proportion (rounded to the nearest thousandths). Calculate the lower bound of the 95% confidence interval (rounded to the nearest thousandths). Calculate the upper bound of the 95% confidence interval (rounded to the nearest thousandths).
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