The standard normal curve areas, in the following range of values z.Z = 2.1) 2 to 3Z = 0 to 2.2)-2.032.3) z < -1.19Soln2.1) area under the graph shows from z = 0 to + z (to the right of the graph).Z = 0 to 2 area is equal to 0.4773.Z = 0 to 3 area is equal to 0.4987.Therefore, the area between z = 0 to z = 2 to 3 is equal to 0. = 0.0214 0.4773 4987-Ans.2.2) can be used by the table value for z = 2.03 (graph symmetry).Therefore, the area under the graph z = 0 is equal to-2.03 0.4788 Ans.
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