For each of the following situations, find the critical value for Z.
a) H0: P = 0.05 vs. HA: P > 0.05 at α = 0.05.
b) H0: P = 0.6 vs. HA: P ≠ 0.6 at α = 0.01.
c) H0: P = 0.5 vs. HA: P < 0.5 at α = 0.01; n = 500.
d) H0: P = 0.2 vs. HA: P < 0.2 at α = 0.01.
The solution gives detailed steps on finding critical value for z using excel function.