19. Suppose that the significant level of a statistical hypothesis test is $\alpha$. The null hypothesis will be rejected when:
(A) \(p\)-value \(\leq \alpha\)
(B) \(p\)-value \(>\alpha\)
(C) \(p\)-value \(\leq \alpha / 2\)
(D) \(p\)-value \(>\alpha / 2\)
(E) \(p\)-value \(= \frac{\alpha}{2}\)

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