Java を使用してオンライン試験システムの試験用紙の品質評価を作成する方法

public class ExamEvaluation {
    // 计算试题的难易程度
    public double calculateDifficulty(Question question) {
        // 根据试题的难度系数计算难度
        // 假设难度系数在0-1之间，0代表最简单，1代表最难
        return question.getCoefficient();
    }

    // 计算试题的区分度
    public double calculateDiscrimination(Question question, List<StudentAnswer> studentAnswers) {
        // 计算每个选项的选择人数
        Map<String, Integer> optionCount = new HashMap<>();
        for (StudentAnswer answer : studentAnswers) {
            String option = answer.getOption();
            optionCount.put(option, optionCount.getOrDefault(option, 0) + 1);
        }
        
        // 计算正确选项的选择人数
        int correctOptionCount = optionCount.getOrDefault(question.getCorrectOption(), 0);
        
        // 计算区分度
        double discrimination = (double) correctOptionCount / studentAnswers.size();

        return discrimination;
    }
    
    // 计算试题的选择性
    public double calculateSelectivity(Question question, List<StudentAnswer> studentAnswers) {
        // 计算每个选项的选择人数
        Map<String, Integer> optionCount = new HashMap<>();
        for (StudentAnswer answer : studentAnswers) {
            String option = answer.getOption();
            optionCount.put(option, optionCount.getOrDefault(option, 0) + 1);
        }
        
        // 计算每个选项的选择率
        Map<String, Double> optionSelectivity = new HashMap<>();
        int totalStudentCount = studentAnswers.size();
        for (String option : question.getOptions()) {
            int optionCount = optionCount.getOrDefault(option, 0);
            double selectivity = (double) optionCount / totalStudentCount;
            optionSelectivity.put(option, selectivity);
        }
        
        // 计算选择性
        double selectivity = 1.0 - Collections.max(optionSelectivity.values());

        return selectivity;
    }
}