A research company wants to determine whether there is a difference in effectiveness of a brand- name ibuprofen and generic ibuprofen. What are the appropriate hypotheses for this testing scenario? Let µ1 equal the mean of the effectiveness of brand-name ibuprofen and µ2 equal the mean of the effectiveness of generic ibuprofen. Ο Ho: μ1-μ20 Hạ: H1 - H2 > 0 Ο Ho: μι- μ-0 Hạ: H1 - H2 < 0 O Ho: µ1 - µ2 = 0 Ha: H1 - µ2 # 0 O Ho: š1 – X2 = 0 Hạ: X1 - X2 > 0 O Ho: X1 – X2 = 0 Hạ: X1 - X2 + 0

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