Answer
a. α = 0.02, left-tailed test
According to the table, z = - 2.05
b. α = 0.05, right-tailed test
z = 1-α = 0.95
According to the table, z = 1.645
c. α = 0.01, two-tailed test
z =α/2 = 0.01/2 = 0.005
According to the table, $z_α$ = -2.575 and 2.575
d. α = 0.04, left-tailed test
According to the table, z = - 1.75
e. α = 0.02, right-tailed test
z = 1-α = 0.98
According to the table, z = 2.05
