Not really sure what the answer is to this question. Can someone please confirm this. I got two different answer but not sure which one is correct.
1) z = -1.282 (from normal table)
x = z(sigma) + mu = -1.282(5) + -10 = -16.41
2)z = 1.282 (from normal table)
x = z(sigma) + mu = 1.282(5) + -10 = -3.59
Please cans some1 tell me which 1 is correct thanks