In probability and statistics,skewness coefficient reflects the symmetry characteristics of density curve of the random variable.As the skewness coefficient is involved in the first three moments of the distribution,it is very difficult to get good estimates for skewness coefficient.This paper builds Bayes model and proposes approximate linear Bayesian estimation for skewness coefficient.In addition,the hyper-parameters of prior distribution are estimated in the multitude data structure,thus deriving the em...