Question 616146
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi, 
population with µ=74.5 and &#963;=3.04.
 (A) Calculate the z-score for x=75.7 (the x has a line over it) from a sample of size 18.
 {{{z = (75.7 - 74.5) / (3.04 / sqrt (18)) = 1.674}}}good work.
Below: z = 1.674 represented by blue line
 {{{drawing(400,200,-5,5,-.5,1.5, graph(400,200,-5,5,-.5,1.5, 0,exp(-x^2/2)), blue(line( 1.674,0, 1.674,exp(-1.674^2/2))),locate(4.8,-.01,z),locate(4.8,.2,z))}}}