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Researchers randomly and independently selected 28 prisoners diagnosed with chronic posttraumatic stress disorder (PTSD) and 22 prisoners that were diagnosed with PTSD but had since recovered (remitte...

Researchers randomly and independently selected 28 prisoners diagnosed with chronic posttraumatic stress disorder (PTSD) and 22 prisoners that were diagnosed with PTSD but had since recovered (remitted). The ages, in years, at arrest yielded the summary statistics shown in the table to the right. Use a TI-83/84 calculator to find a 95% confidence interval for the difference between the mean ages at arrest of prisoners with chronic PTSD and remitted PTSD. Chronic Remitted

(a) Confidence interval:

(b) Does the confidence inter contain 0?

(c) Based on your confidence interval, is there a difference between the mean ages at arrest of prisoners with chronic PTSD and remitted PTSD?

chronic remitted

X1=273 x2=233

s1=5 s2=8

n1=28 n2=22

math   Statistics-And-Probability   
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