Preliminary analyses indicate that you can consider the assumptions for using nonpooled​ t-procedures satisfied. Researchers randomly and independently selected 28

Preliminary analyses indicate that you can consider the assumptions for using nonpooled​ t-procedures satisfied. Researchers randomly and independently selected 28 prisoners diagnosed with chronic posttraumatic stress disorder​ (PTSD) and 23 prisoners that were diagnosed with PTSD but had since recovered​ (remitted).

Obtain a ​95% confidence interval for the​ difference, ​, between the mean ages at arrest for prisoners with chronic PTSD and remitted PTSD

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