Step 1 :Divide the total area by 2 to find the area in each tail: \(\frac{0.318}{2} = 0.159\)
Step 2 :Use a z-table or a calculator to find the corresponding z values: \(z = 0.9985762706156592\) and \(z = -0.9985762706156592\)
Step 3 :Round the z values to the nearest integer: \(z = 1\) and \(z = -1\)
Step 4 :\(\boxed{z = 1 \text{ and } z = -1}\)