Question 626949
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Hi,
88% Confidence Interval Upper and Lower Limit.  Graph
 P = .88  &#8658;  a = .12   &  a/2 = .06  &#8658;  z = ± 1.5548 
{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, exp(-x^2/2)), green(line(-1.5548,0,-1.5548,exp(-1.5548^2/2)),line(1.5548,0,1.5548,exp(-1.5548^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}