=+6. For each of the following situations, find the critical value for z or t.

a) H0: m = 105 vs. HA: m ≠ 105 at a = 0.05; n = 61.

b) H0: p = 0.05 vs. HA: p 7 0.05 at a = 0.05.

c) H0: p = 0.6 vs. HA: p ≠ 0.6 at a = 0.01.

d) H0: p = 0.5 vs. HA: p 6 0.5 at a = 0.01; n = 500.

e) H0: p = 0.2 vs. HA: p 6 0.2 at a = 0.01.

Section 12.4