Labeler's vote and Kappa calculation

A Study on Classifying Stack Overflow Questions Based on Difficulty by Utilizing Contextual Features All Rater's Label: Consist of all the labels given by the rater's Fleiss Kappa: The kappa value calculation on the rater's inter-agreeability.基于上下文特征的Stack Overflow问题难度分类研究。所有标注者的标签集包含所有标注者所给出的标签；弗莱西斯Kappa系数（Fleiss Kappa）：针对标注者间一致性的Kappa值计算。