For test hypothesis H0 : μ1 ≤ μ2 and H1 : μ1 > μ2, the critical region (Z) at ∝ = 0.10 and n > 30 will be

1
Z ≤ 1.96
2
Z > 1.96
3
Z > 1.645
4
Z ≤ -1.645

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