4. What are the hypotheses for testing if the average weights of babies born to smoking and non-smoking mothers a different? Ho : Hsmoking = Hnon-smoking HA : Hsmoking > Hnon-smoking Ho : Hsmoking = Hnon-smoking HẠ: Hsmoking # Hnon-smoking O Ho : ēsmoking = ¤non-smoking HẠ : āsmoking # ữnon-smoking O Ho : ēsmoking = ¤non-smoking HA : ë smoking > Fnon-smoking O Ho : µsmoking # Hnon-smoking HẠ: Hsmoking = Hnon-smoking

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