Question 912847
A.  {{{z =blue (x - mu)/blue(sigma)}}} z = .5/2.3, P(z < .2174) = .5861 0r 58.61%
B.  {{{z =blue (x - mu)/blue(sigma/sqrt(n))}}} z = .5/(2.3/sqrt(43), P( z < 1.4255)= .9230 0r 92.30%