Question 1104093
<pre>
What you want is the z-ccore on the x axis such that the area
under the normal curve to the left of it is exactly 0.5, so that 
the area under the normal curve to the left of any z-score right 
of it will be greater than 0.5.

All the area under the normal curve (between the curve and the
x-axis is equal to 1.  Since 0.5 is half of 1, the z-score on the
x-axis that is right in the middle of the graph is 0.   

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