Preliminary analyses indicate that you can consider the assumptions for using nonpooled t-procedures satisfied. Researchers randomly and independently selected 27 prisoners diagnosed with chronic posttraumatic stress disorder (PTSD) and 22 prisoners that were diagnosed with PTSD but had since recovered (remitted).

Chronic Remmited

X1 = 28.9 X2= 21.5

s1= 4 S2= 2

n1= 27 n2= 22

he 95% confidence interval is from............ to .............