fidence interval ion of imprisonment, u, of all East German political prisoners wi chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the accura of the estimate. c. Find the sample size required to have a margin of error of 12 mon and a 99% confidence level. (Recall that o = 42 months.) d. Find a 99% confidence interval for the mean duration of imprisc ment, μ, if a sample of the size determined in part (c) has a me of 36.2 months.

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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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