Question 1050440
 {{{blue(sigma)*z + mu=blue (x)}}}
z invNorm(.05/2) = invNorm(.025)= -1.96 and z = invNorm(.975) = 1.96
-1.96σ + μ = 24.6
<u> 1.96&#963; + &#956; = 37.4 </u>
2&#956; = 62
&#956;= 31 
 1.96&#963; + 31 = 37.4
&#963; = 6.4/1.96 = 3.265  (Round as Directed)