大型客车燃油消耗量分布模型的拟合优度检验

摘要

以102个大型客车燃油消耗量样本的D、A~2和W~2统计量对6种分布模型进行拟合优度检验,包括概率分布检验和似然比择优检验.结果表明,Gamma分布比其它分布模型更好地描述大型客车燃油消耗量的分布特征.用Gamma分布模型计算了满足不同燃料消耗限值的客车百分比,为合理设定燃料消耗限值提供了理论依据.%The good-of-fit test, covering probability distribution test and likelihood ratio test is conducted on six distribution models with the D, A~2 and W~2 statistics of 102 fuel consumption samples of large buses. The re-suits show that Gamma distribution can better describe the distribution characteristics of fuel consumption of large buses compared with other distribution models. Finally the percentages of large buses meeting different fuel con-sumption limits are calculated by using Gamma distribution model. This provides a theoretical base for rationally set-ting fuel consumption limits.