Case 3. P ( a

Case 3. P ( a < z < b) Determine the area under the standard curve between z 0.08 and z = 1.96 Answer: The area to the left of z = 0.08 is 0.5319 and the area to the left of z = 1.96 is 0.9750. The required area is the difference between the bigger area and the smaller area. P (a < z < b) = 0.9750 - 0.5319 04431 .Thus. the area between 0.08 and 1.96 is 0.4431 Percentage of Area under the Normal Curve means you have to multiple the area value by 100.