3.1 Statistical Models

Here we describe the 3 types of statistical models we consider: Parametric Estimation, Kernel Density Estimation, Root Transform Local Linear Regression. Parametric Models are used in previous work \cite{Guo_2019} \cite{Sheng_2019}. KDE is commonly used in related studies on renewable energy \cite{Wahbah_2019a}.  RTLLR proving more recent method show to be successful on renewables.