Question 1141505
z=(x bar-mean)/sigma/sqrt(n
a.  x < -10/25/5 or z< -2 and probability is 0.0228
b. z between -2 and -8.5*5/25 or -1.69, and that probability is 0.0228
c. above 104.4 is z>0.4*5/25 or z>0.08 or probability 0.4681
d. this is looking for the z value for 0.3200 probability, which is -0.47 (-0.468), and that is 
-0.468=(x bar-104/5)
-2.34=x bar-104, so X bar is above 101.66 or 101.7