- Suppose z is the standard normal variable. Draw the normal curve for each of the following probability statements to Visualize the required area. Report answers accurate to at least 4 decimal places. a. P(-6.93 S 2 S 0) = C] b. P(z g 1.11 and 7: g 0.11) = C] c. P(z 2 -0.78 and z S -2.27) = C] d. P(z Z -1.11 or z 2 2.29) = C] e. P(z S -1.33 or z 2 -1.32) = C] f. P(z S -1.39 given 2 S 0) = C] 9. P(z -0.11 given 2