According to a study of political prisoners, the mean duration of imprisonment for 38 prisoners with chronic post-traumatic stress disorder (PTSD) was 31.1 months. Assuming that o = 35 months,...

Extracted text: According to a study of political prisoners, the mean duration of imprisonment for 38 prisoners with chronic post-traumatic stress disorder (PTSD) was 31.1 months. Assuming that o = 35 months, determine a 90% confidence interval for the mean duration of imprisonment, µ, of all political prisoners with chronic PTSD. Interpret your answer in words. Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. A 90% confidence interval for the population mean is from months to (Round to one decimal place as needed.) months.