Question 632477
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
P(-.55 < z < .55) = .4176    | Note: cannot have a  -probability

{{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, exp(-x^2/2)), green(line(.55,0,.55,exp(-.55^2/2)),line(-.55,0,-.55,exp(-.55^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}