Question 409362
  <pre><font size = 3 color = "indigo"><b>
Hi
For a normally distributed population with a mean =90 and a standard deviation =7,
if Jenny has a raw score of 76, what is the z-score?
*Note: {{{z = blue(x - mu)/blue(sigma)}}}
    z = (76-90)/7 = -14/7 = -2  (2 standard deviations 'below' the mean)
{{{drawing(300,300,-5,5,-1,1,blue(line(-2,5,-2,-5)), grid(1),graph( 300, 300,-5,5,-1,1,(1/sqrt(2*pi))*3^((-x^2/2)))) }}}