A two-factor research study is used to evaluate the effectiveness of a new blood-pressure medication.In this two-factor study,factor A is medication versus no medication and factor B is male versus female.The medicine is expected to reduce blood pressure for both males and females,but it is expected to have a much greater effect for males.What pattern of results should be obtained if the medication works as predicted?
A)A significant main effect for factor A (medication)
B)A significant interaction
C)A significant main effect for factor A and a significant interaction
D)An insignificant main effect for factor A (medication)

Question

A two-factor research study is used to evaluate the effectiveness of a new blood-pressure medication.In this two-factor study,factor A is medication versus no medication and factor B is male versus female.The medicine is expected to reduce blood pressure for both males and females,but it is expected to have a much greater effect for males.What pattern of results should be obtained if the medication works as predicted?​
A)​A significant main effect for factor A (medication)
B)​A significant interaction
C)​A significant main effect for factor A and a significant interaction
D)​An insignificant main effect for factor A (medication)

Quizplus · Accepted Answer

If the medication works as predicted, there should be a significant main effect for factor A (medication) because the medication is expected to reduce blood pressure. However, there should also be a significant interaction between factors A and B because the medication is expected to have a much greater effect for males. Therefore, the pattern of results expected is a significant main effect for factor A and a significant interaction, which is the choice C.

A Two-Factor Research Study Is Used to Evaluate the Effectiveness