I have a factorial design with two independent variables A and B. The factor A has 2 levels and factor B has 5 levels. Now I want to see their main effect and interactive effects on X. I am not sure whether I am writing the hypothesis statement correct or not.

My first question is: Do I have to write only one hypothesis statement or do I have to basically write three (3) separate statements (2 for main effects and 1 for interactive effect)? This is what I have written: Hypothesis 1: There is a significant effect of A on X Hypothesis 2: There is a significant effect of B on X Hypothesis 3: There is a significant interaction effect of A and B on X

Someone (experienced) reviewed it and asked me why do I have three hypothesis? I am a student, can please someone suggest me what am I doing wrong here?

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    $\begingroup$ First, can you please describe in non-statistical language what questions you want to ask from the data? What do you want to learn from the data? What are your response variable measuring? Your two independent variables A and B, what do they represent? Is this a planed experiment? randomized? ... $\endgroup$ – kjetil b halvorsen Jan 6 at 15:25

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