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Could you help me with the Lab Chapter 10(Statistics), its about the oil company. I think my Null and Hypothesis are right but everyone else

Could you help me with the Lab Chapter 10(Statistics), its about the oil company. I think my Null and Hypothesis are right but everyone else has a different answer. Could you help me figure out what I am doing wrong. My Null Hypothesis was that M<30, and my alternative was that M>30. Could you tell me if this is right and if not, what I am doing wrong?

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