Posted by Katie on Sunday, February 24, 2013 at 9:17pm.
In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = 3?
is it 16, 18, or 20

statistics  MathGuru, Monday, February 25, 2013 at 4:43pm
Formula:
z = (x  mean)/sd
Plug in the numbers you know from the problem:
3 = (x  25)/3
Solve for x.