“…The wind speed data were almost transformed from Weibull distribution to normal distribution by Dubey method which the shape parameters of data is transformed to 3.6 and the power m for the transformation was specified by measure of distribution symmetry [1], Skewness method [3,4,6,10] or by Box-Cox method which the power l for the transformation is specified by minimizing the Skewness of the data [8]. However, the transformed data was not checked the strongly stationary [1,10] or instead of checking the strongly stationary of transformed data, normal distribution is only considered by comparing with corresponding normal probability density [3,4,8] or testing non-stationary of transformed data by Duckey-fuller test [9]. These papers assumed that transformed data fitted to a p th order autoregressive process AR(p) [1] or the transformed data fitted to a p th order autoregressive process AR(p) by autocorrelation, partial autocorrelation analysis in identification process but there was no using Bayesian information criterion (BIC) to select an accurate class of ARMA(p,q) [3] or ACF, PACF and BIC were analyzed but the AR(p) was selected too soon after ACF and PACF analysis [8], instead of analyzing ACF, PACF and BIC together or using only AIC [9,10].…”