Understanding the z notation, z(), requires us to know whether we have a z-score or an area.

Each of the following expressions use the z notation in a variety of ways, some typical and some not so typical. Find the value asked for in each of the following; then, with the aid of a diagram, explain what your answer represents.

a. z(0.08)

b. The area between z(0.98) and z(0.02)

c. z(1.00  0.01)

d. z(0.025)  z(0.975)