Given H0 12 for which confidence interval should you rejec

Given H0: ? ? 12, for which confidence interval should you reject H0? The answer is (13,16) can you show me the steps?

Pretty much, nothing must be 12 or less in order to reject Ho. Since (13, 16) is not included in 12 or less, you can reject it. Anything above 12 and doesn\'t overlap with 12 or less demands the rejection of Ho.