The statistical model is put forward to test the accuracy of item difficulty indexes in the test papers given by the educational experts.
提出一个统计模型，用于检验试题库中由专家给出试题难度这一指标的准确性。
The statistical model is put forward to test the accuracy of item difficulty indexes in the test papers given by the educational experts.
提出一个统计模型，用于检验试题库中由专家给出试题难度这一指标的准确性。
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