Question 427624
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
Note: {{{z =blue (x - mu)/blue(sigma/sqrt(n))}}}
 z = (2.79-3.00) / .7/3 = -.21 *3/.7 = -.9
P(z > -.9) =  probability that the average diameter is more than 2.790mm