Instrument validity, sampling and result of implementation discovery learning in online setting

The data contains item validity, reliability, discrepancy and difficulty level of the item questions; sample selection; data on learning outcomes and student independence, including the calculation of the t-test.本数据集涵盖以下内容：试题题项的效度（item validity）、信度（reliability）、差异度（discrepancy）与难度水平；抽样选择相关信息；以及学习成果与学生自主性（student independence）相关数据，其中包含t检验（t-test）的计算过程。