Critical values for each of the following situations, find the critical value(s) for z or t. h 0 : p = 0.5 vs. h a : p ≠ 0.5 at α = 0.05 . h 0 : p = 0.4 vs. h a : p > 0.4 at α = 0.05 . h 0 : μ = 10 vs. h a : μ ≠ 10 at α = 0.05 ; n = 36 . h 0 : p = 0.5 vs. h a : p > 0.5 at α = 0.01 ; n = 345 . h 0 : μ = 20 vs. h a : μ < 20 at α = 0.01 ; n = 1000 .