I have a question regarding Ordinal data. I have measured 'Attitude towards a product' using Likert scale and I have measured 'Purchase Intentions to buy the product' also using Likert scale. Now I have to check "if Attitude influences Purchase Intention". Given both the response as well as independent variables are Ordinal, which is the best test to analyze my hypothesis? Thanks! If the question has already been answered, it would be great if you could point me out in the direction.
If one of your variables is ordinal, you may want to consider using a Spearman Rank correlation. Based on your description I assume that there were no experimental manipulations in your study. Thus, I think it would be best to be very careful in making conclusions concerning causality ("influences"), as you cannot rule out that there is, for instance, a third variable that is responsible for the association you observed (cf. moderators/mediators).