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8.89 Political Prisoners. In Exercise 8.73, you found à 95% con- fidence interval of 18.8 months to 48.0 months for the mean dura- tion of imprisonment, u, of all East German political prisoners with chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the accuracy of the estimate. c. Find the sample size required to have a margin of error of 12 months and a 99% confidence level. (Recall that o = 42 months.)

8.89 Political Prisoners. In Exercise 8.73, you found à 95% con- fidence interval of 18.8 months to 48.0 months for the mean dura- tion of imprisonment, u, of all East German political prisoners with chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the accuracy of the estimate. c. Find the sample size required to have a margin of error of 12 months and a 99% confidence level. (Recall that o = 42 months.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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8.89 Political Prisoners. In Exercise 8.73, you found a 95% con- fidence interval of 18.8 months to 48.0 months for the mean dura- tion of imprisonment, u, of all East German political prisoners with chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the of the estimate. accuracy c. Find the sample size required to have a margin of error of 12 months and a 99% confidence level. (Recall that o = 42 months.) d. Find a 99% confidence interval for the mean duration of imprison- ment, u, if a sample of the size determined in part (c) has a mean of 36.2 months.
Transcribed Image Text:8.89 Political Prisoners. In Exercise 8.73, you found a 95% con- fidence interval of 18.8 months to 48.0 months for the mean dura- tion of imprisonment, u, of all East German political prisoners with chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the of the estimate. accuracy c. Find the sample size required to have a margin of error of 12 months and a 99% confidence level. (Recall that o = 42 months.) d. Find a 99% confidence interval for the mean duration of imprison- ment, u, if a sample of the size determined in part (c) has a mean of 36.2 months.
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