I used OLS model to understand the effect of promotion on units sold. I have transformed the dependent variable( square root) as well as the independent variables(standard scaler).The coefficients that I have are from the transformed model. I want to build a response curve( how changing promotion by x% will impact units sold), for which I need output in untransformed form. How do I proceed ?
- Do I calculate the untransformed coefficients? If so how ? because the dependent variable has undergone a square root transformation and as a result squaring the equation is making the calculation complex
- Any other approach?